Merge branch 'master' of https://github.com/minetest/minetest

45 files changed, 1221 insertions, 908 deletions

diff --git a/builtin/async/game.lua b/builtin/async/game.lua
new file mode 100644
index 000000000..e3119d8cb
--- /dev/null
+++ b/builtin/async/game.lua
@@ -0,0 +1,46 @@
+core.log("info", "Initializing asynchronous environment (game)")
+
+local function pack2(...)
+	return {n=select('#', ...), ...}
+end
+
+-- Entrypoint to run async jobs, called by C++
+function core.job_processor(func, params)
+	local retval = pack2(func(unpack(params, 1, params.n)))
+
+	return retval
+end
+
+-- Import a bunch of individual files from builtin/game/
+local gamepath = core.get_builtin_path() .. "game" .. DIR_DELIM
+local commonpath = core.get_builtin_path() .. "common" .. DIR_DELIM
+
+dofile(gamepath .. "constants.lua")
+dofile(gamepath .. "item_s.lua")
+dofile(gamepath .. "misc_s.lua")
+dofile(gamepath .. "features.lua")
+dofile(commonpath .. "voxelarea.lua")
+
+-- Transfer of globals
+do
+	local all = assert(core.transferred_globals)
+	core.transferred_globals = nil
+
+	-- reassemble other tables
+	all.registered_nodes = {}
+	all.registered_craftitems = {}
+	all.registered_tools = {}
+	for k, v in pairs(all.registered_items) do
+		if v.type == "node" then
+			all.registered_nodes[k] = v
+		elseif v.type == "craftitem" then
+			all.registered_craftitems[k] = v
+		elseif v.type == "tool" then
+			all.registered_tools[k] = v
+		end
+	end
+
+	for k, v in pairs(all) do
+		core[k] = v
+	end
+end
diff --git a/builtin/async/init.lua b/builtin/async/mainmenu.lua
index 3803994d6..0e9c222d1 100644
--- a/builtin/async/init.lua
+++ b/builtin/async/mainmenu.lua
@@ -1,5 +1,4 @@
-
-core.log("info", "Initializing Asynchronous environment")
+core.log("info", "Initializing asynchronous environment")
 
 function core.job_processor(func, serialized_param)
 	local param = core.deserialize(serialized_param)
@@ -8,4 +7,3 @@ function core.job_processor(func, serialized_param)
 
 	return retval or core.serialize(nil)
 end
-
diff --git a/builtin/client/register.lua b/builtin/client/register.lua
index f17188b84..637a22556 100644
--- a/builtin/client/register.lua
+++ b/builtin/client/register.lua
@@ -1,4 +1,3 @@
-
 core.callback_origins = {}
 
 local getinfo = debug.getinfo
diff --git a/builtin/common/after.lua b/builtin/common/after.lua
index e20f292f0..bce262537 100644
--- a/builtin/common/after.lua
+++ b/builtin/common/after.lua
@@ -37,7 +37,14 @@ function core.after(after, func, ...)
 		arg = {...},
 		mod_origin = core.get_last_run_mod(),
 	}
+
 	jobs[#jobs + 1] = new_job
 	time_next = math.min(time_next, expire)
-	return { cancel = function() new_job.func = function() end end }
+
+	return {
+		cancel = function()
+			new_job.func = function() end
+			new_job.args = {}
+		end
+	}
 end
diff --git a/builtin/common/chatcommands.lua b/builtin/common/chatcommands.lua
index 62f9eacd0..817f1f526 100644
--- a/builtin/common/chatcommands.lua
+++ b/builtin/common/chatcommands.lua
@@ -6,6 +6,42 @@ local S = core.get_translator("__builtin")
 
 core.registered_chatcommands = {}
 
+-- Interpret the parameters of a command, separating options and arguments.
+-- Input: command, param
+--   command: name of command
+--   param: parameters of command
+-- Returns: opts, args
+--   opts is a string of option letters, or false on error
+--   args is an array with the non-option arguments in order, or an error message
+-- Example: for this command line:
+--      /command a b -cd e f -g
+-- the function would receive:
+--      a b -cd e f -g
+-- and it would return:
+--	"cdg", {"a", "b", "e", "f"}
+-- Negative numbers are taken as arguments. Long options (--option) are
+-- currently rejected as reserved.
+local function getopts(command, param)
+	local opts = ""
+	local args = {}
+	for match in param:gmatch("%S+") do
+		if match:byte(1) == 45 then -- 45 = '-'
+			local second = match:byte(2)
+			if second == 45 then
+				return false, S("Invalid parameters (see /help @1).", command)
+			elseif second and (second < 48 or second > 57) then -- 48 = '0', 57 = '9'
+				opts = opts .. match:sub(2)
+			else
+				-- numeric, add it to args
+				args[#args + 1] = match
+			end
+		else
+			args[#args + 1] = match
+		end
+	end
+	return opts, args
+end
+
 function core.register_chatcommand(cmd, def)
 	def = def or {}
 	def.params = def.params or ""
@@ -78,22 +114,30 @@ if INIT == "client" then
 	end
 end
 
+local function format_help_line(cmd, def)
+	local cmd_marker = INIT == "client" and "." or "/"
+	local msg = core.colorize("#00ffff", cmd_marker .. cmd)
+	if def.params and def.params ~= "" then
+		msg = msg .. " " .. def.params
+	end
+	if def.description and def.description ~= "" then
+		msg = msg .. ": " .. def.description
+	end
+	return msg
+end
+
 local function do_help_cmd(name, param)
-	local function format_help_line(cmd, def)
-		local cmd_marker = "/"
-		if INIT == "client" then
-			cmd_marker = "."
-		end
-		local msg = core.colorize("#00ffff", cmd_marker .. cmd)
-		if def.params and def.params ~= "" then
-			msg = msg .. " " .. def.params
-		end
-		if def.description and def.description ~= "" then
-			msg = msg .. ": " .. def.description
-		end
-		return msg
+	local opts, args = getopts("help", param)
+	if not opts then
+		return false, args
+	end
+	if #args > 1 then
+		return false, S("Too many arguments, try using just /help <command>")
 	end
-	if param == "" then
+	local use_gui = INIT ~= "client" and core.get_player_by_name(name)
+	use_gui = use_gui and not opts:find("t")
+
+	if #args == 0 and not use_gui then
 		local cmds = {}
 		for cmd, def in pairs(core.registered_chatcommands) do
 			if INIT == "client" or core.check_player_privs(name, def.privs) then
@@ -116,7 +160,10 @@ local function do_help_cmd(name, param)
 				.. "everything.")
 		end
 		return true, msg
-	elseif param == "all" then
+	elseif #args == 0 or (args[1] == "all" and use_gui) then
+		core.show_general_help_formspec(name)
+		return true
+	elseif args[1] == "all" then
 		local cmds = {}
 		for cmd, def in pairs(core.registered_chatcommands) do
 			if INIT == "client" or core.check_player_privs(name, def.privs) then
@@ -131,7 +178,11 @@ local function do_help_cmd(name, param)
 			msg = core.gettext("Available commands:")
 		end
 		return true, msg.."\n"..table.concat(cmds, "\n")
-	elseif INIT == "game" and param == "privs" then
+	elseif INIT == "game" and args[1] == "privs" then
+		if use_gui then
+			core.show_privs_help_formspec(name)
+			return true
+		end
 		local privs = {}
 		for priv, def in pairs(core.registered_privileges) do
 			privs[#privs + 1] = priv .. ": " .. def.description
@@ -139,7 +190,7 @@ local function do_help_cmd(name, param)
 		table.sort(privs)
 		return true, S("Available privileges:").."\n"..table.concat(privs, "\n")
 	else
-		local cmd = param
+		local cmd = args[1]
 		local def = core.registered_chatcommands[cmd]
 		if not def then
 			local msg
@@ -165,8 +216,8 @@ if INIT == "client" then
 	})
 else
 	core.register_chatcommand("help", {
-		params = S("[all | privs | <cmd>]"),
-		description = S("Get help for commands or list privileges"),
+		params = S("[all | privs | <cmd>] [-t]"),
+		description = S("Get help for commands or list privileges (-t: output in chat)"),
 		func = do_help_cmd,
 	})
 end
diff --git a/builtin/common/information_formspecs.lua b/builtin/common/information_formspecs.lua
index e814b4c43..3405263bf 100644
--- a/builtin/common/information_formspecs.lua
+++ b/builtin/common/information_formspecs.lua
@@ -125,30 +125,12 @@ core.register_on_player_receive_fields(function(player, formname, fields)
 	end
 end)
 
-
-local help_command = core.registered_chatcommands["help"]
-local old_help_func = help_command.func
-
-help_command.func = function(name, param)
-	local admin = core.settings:get("name")
-
-	-- If the admin ran help, put the output in the chat buffer as well to
-	-- work with the server terminal
-	if param == "privs" then
-		core.show_formspec(name, "__builtin:help_privs",
-			build_privs_formspec(name))
-		if name ~= admin then
-			return true
-		end
-	end
-	if param == "" or param == "all" then
-		core.show_formspec(name, "__builtin:help_cmds",
-			build_chatcommands_formspec(name))
-		if name ~= admin then
-			return true
-		end
-	end
-
-	return old_help_func(name, param)
+function core.show_general_help_formspec(name)
+	core.show_formspec(name, "__builtin:help_cmds",
+		build_chatcommands_formspec(name))
 end
 
+function core.show_privs_help_formspec(name)
+	core.show_formspec(name, "__builtin:help_privs",
+		build_privs_formspec(name))
+end
diff --git a/builtin/common/misc_helpers.lua b/builtin/common/misc_helpers.lua
index e4bc056d9..542b2040d 100644
--- a/builtin/common/misc_helpers.lua
+++ b/builtin/common/misc_helpers.lua
@@ -543,7 +543,7 @@ if INIT == "mainmenu" then
 	end
 end
 
-if INIT == "client" or INIT == "mainmenu" then
+if core.gettext then -- for client and mainmenu
 	function fgettext_ne(text, ...)
 		text = core.gettext(text)
 		local arg = {n=select('#', ...), ...}
diff --git a/builtin/common/strict.lua b/builtin/common/strict.lua
index ccde9676b..f46234dc6 100644
--- a/builtin/common/strict.lua
+++ b/builtin/common/strict.lua
@@ -1,8 +1,3 @@
-
--- Always warn when creating a global variable, even outside of a function.
--- This ignores mod namespaces (variables with the same name as the current mod).
-local WARN_INIT = false
-
 local getinfo = debug.getinfo
 
 function core.global_exists(name)
@@ -33,11 +28,6 @@ function meta:__newindex(name, value)
 		end
 		declared[name] = true
 	end
-	-- Ignore mod namespaces
-	if WARN_INIT and name ~= core.get_current_modname() then
-		core.log("warning", ("Global variable %q created at %s.")
-			:format(name, desc))
-	end
 	rawset(self, name, value)
 end
 
@@ -54,4 +44,3 @@ function meta:__index(name)
 end
 
 setmetatable(_G, meta)
-
diff --git a/builtin/common/tests/misc_helpers_spec.lua b/builtin/common/tests/misc_helpers_spec.lua
index b16987f0b..b11236860 100644
--- a/builtin/common/tests/misc_helpers_spec.lua
+++ b/builtin/common/tests/misc_helpers_spec.lua
@@ -1,4 +1,5 @@
 _G.core = {}
+_G.vector = {metatable = {}}
 dofile("builtin/common/vector.lua")
 dofile("builtin/common/misc_helpers.lua")
 
diff --git a/builtin/common/tests/serialize_spec.lua b/builtin/common/tests/serialize_spec.lua
index e46b7dcc5..69b2b567c 100644
--- a/builtin/common/tests/serialize_spec.lua
+++ b/builtin/common/tests/serialize_spec.lua
@@ -1,4 +1,5 @@
 _G.core = {}
+_G.vector = {metatable = {}}
 
 _G.setfenv = require 'busted.compatibility'.setfenv
 
diff --git a/builtin/common/tests/vector_spec.lua b/builtin/common/tests/vector_spec.lua
index 2a50e2889..6a0b81a89 100644
--- a/builtin/common/tests/vector_spec.lua
+++ b/builtin/common/tests/vector_spec.lua
@@ -1,4 +1,4 @@
-_G.vector = {}
+_G.vector = {metatable = {}}
 dofile("builtin/common/vector.lua")
 
 describe("vector", function()
@@ -128,6 +128,14 @@ describe("vector", function()
 		assert.equal(vector.new(4.1, 5.9, 5.5), a:apply(f))
 	end)
 
+	it("combine()", function()
+		local a = vector.new(1, 2, 3)
+		local b = vector.new(3, 2, 1)
+		assert.equal(vector.add(a, b), vector.combine(a, b, function(x, y) return x + y end))
+		assert.equal(vector.new(3, 2, 3), vector.combine(a, b, math.max))
+		assert.equal(vector.new(1, 2, 1), vector.combine(a, b, math.min))
+	end)
+
 	it("equals()", function()
 		local function assertE(a, b)
 			assert.is_true(vector.equals(a, b))
@@ -300,6 +308,7 @@ describe("vector", function()
 
 	it("from_string()", function()
 		local v = vector.new(1, 2, 3.14)
+		assert.is_true(vector.check(vector.from_string("(1, 2, 3.14)")))
 		assert.same({v, 13}, {vector.from_string("(1, 2, 3.14)")})
 		assert.same({v, 12}, {vector.from_string("(1,2 ,3.14)")})
 		assert.same({v, 12}, {vector.from_string("(1,2,3.14,)")})
diff --git a/builtin/common/vector.lua b/builtin/common/vector.lua
index 02fc1bdee..a08472e32 100644
--- a/builtin/common/vector.lua
+++ b/builtin/common/vector.lua
@@ -6,10 +6,8 @@ Note: The vector.*-functions must be able to accept old vectors that had no meta
 -- localize functions
 local setmetatable = setmetatable
 
-vector = {}
-
-local metatable = {}
-vector.metatable = metatable
+-- vector.metatable is set by C++.
+local metatable = vector.metatable
 
 local xyz = {"x", "y", "z"}
 
@@ -61,7 +59,7 @@ function vector.from_string(s, init)
 	if not (x and y and z) then
 		return nil
 	end
-	return {x = x, y = y, z = z}, np
+	return fast_new(x, y, z), np
 end
 
 function vector.to_string(v)
@@ -112,6 +110,14 @@ function vector.apply(v, func)
 	)
 end
 
+function vector.combine(a, b, func)
+	return fast_new(
+		func(a.x, b.x),
+		func(a.y, b.y),
+		func(a.z, b.z)
+	)
+end
+
 function vector.distance(a, b)
 	local x = a.x - b.x
 	local y = a.y - b.y
diff --git a/builtin/fstk/ui.lua b/builtin/fstk/ui.lua
index 976659ed3..13f9cbec2 100644
--- a/builtin/fstk/ui.lua
+++ b/builtin/fstk/ui.lua
@@ -63,7 +63,7 @@ function ui.update()
 	-- handle errors
 	if gamedata ~= nil and gamedata.reconnect_requested then
 		local error_message = core.formspec_escape(
-				gamedata.errormessage or "<none available>")
+				gamedata.errormessage or fgettext("<none available>"))
 		formspec = {
 			"size[14,8]",
 			"real_coordinates[true]",
diff --git a/builtin/game/async.lua b/builtin/game/async.lua
new file mode 100644
index 000000000..469f179d7
--- /dev/null
+++ b/builtin/game/async.lua
@@ -0,0 +1,22 @@
+
+core.async_jobs = {}
+
+function core.async_event_handler(jobid, retval)
+	local callback = core.async_jobs[jobid]
+	assert(type(callback) == "function")
+	callback(unpack(retval, 1, retval.n))
+	core.async_jobs[jobid] = nil
+end
+
+function core.handle_async(func, callback, ...)
+	assert(type(func) == "function" and type(callback) == "function",
+		"Invalid minetest.handle_async invocation")
+	local args = {n = select("#", ...), ...}
+	local mod_origin = core.get_last_run_mod()
+
+	local jobid = core.do_async_callback(func, args, mod_origin)
+	core.async_jobs[jobid] = callback
+
+	return true
+end
+
diff --git a/builtin/game/chat.lua b/builtin/game/chat.lua
index 99296f782..c4fb6314e 100644
--- a/builtin/game/chat.lua
+++ b/builtin/game/chat.lua
@@ -310,12 +310,7 @@ local function handle_revoke_command(caller, revokename, revokeprivstr)
 			and revokename == core.settings:get("name")
 			and revokename ~= ""
 	if revokeprivstr == "all" then
-		revokeprivs = privs
-		privs = {}
-	else
-		for priv, _ in pairs(revokeprivs) do
-			privs[priv] = nil
-		end
+		revokeprivs = table.copy(privs)
 	end
 
 	local privs_unknown = ""
@@ -332,7 +327,10 @@ local function handle_revoke_command(caller, revokename, revokeprivstr)
 		end
 		local def = core.registered_privileges[priv]
 		if not def then
-			privs_unknown = privs_unknown .. S("Unknown privilege: @1", priv) .. "\n"
+			-- Old/removed privileges might still be granted to certain players
+			if not privs[priv] then
+				privs_unknown = privs_unknown .. S("Unknown privilege: @1", priv) .. "\n"
+			end
 		elseif is_singleplayer and def.give_to_singleplayer then
 			irrevokable[priv] = true
 		elseif is_admin and def.give_to_admin then
@@ -359,19 +357,22 @@ local function handle_revoke_command(caller, revokename, revokeprivstr)
 	end
 
 	local revokecount = 0
-
-	core.set_player_privs(revokename, privs)
 	for priv, _ in pairs(revokeprivs) do
-		-- call the on_revoke callbacks
-		core.run_priv_callbacks(revokename, priv, caller, "revoke")
+		privs[priv] = nil
 		revokecount = revokecount + 1
 	end
-	local new_privs = core.get_player_privs(revokename)
 
 	if revokecount == 0 then
 		return false, S("No privileges were revoked.")
 	end
 
+	core.set_player_privs(revokename, privs)
+	for priv, _ in pairs(revokeprivs) do
+		-- call the on_revoke callbacks
+		core.run_priv_callbacks(revokename, priv, caller, "revoke")
+	end
+	local new_privs = core.get_player_privs(revokename)
+
 	core.log("action", caller..' revoked ('
 			..core.privs_to_string(revokeprivs, ', ')
 			..') privileges from '..revokename)
@@ -524,7 +525,7 @@ end
 
 -- Teleports player <name> to <p> if possible
 local function teleport_to_pos(name, p)
-	local lm = 31000
+	local lm = 31007 -- equals MAX_MAP_GENERATION_LIMIT in C++
 	if p.x < -lm or p.x > lm or p.y < -lm or p.y > lm
 			or p.z < -lm or p.z > lm then
 		return false, S("Cannot teleport out of map bounds!")
@@ -621,6 +622,10 @@ core.register_chatcommand("set", {
 
 		setname, setvalue = string.match(param, "([^ ]+) (.+)")
 		if setname and setvalue then
+			if setname:sub(1, 7) == "secure." then
+				return false, S("Failed. Cannot modify secure settings. "
+					.. "Edit the settings file manually.")
+			end
 			if not core.settings:get(setname) then
 				return false, S("Failed. Use '/set -n <name> <value>' "
 					.. "to create a new setting.")
@@ -1034,12 +1039,11 @@ core.register_chatcommand("time", {
 		end
 		local hour, minute = param:match("^(%d+):(%d+)$")
 		if not hour then
-			local new_time = tonumber(param)
-			if not new_time then
-				return false, S("Invalid time.")
+			local new_time = tonumber(param) or -1
+			if new_time ~= new_time or new_time < 0 or new_time > 24000 then
+				return false, S("Invalid time (must be between 0 and 24000).")
 			end
-			-- Backward compatibility.
-			core.set_timeofday((new_time % 24000) / 24000)
+			core.set_timeofday(new_time / 24000)
 			core.log("action", name .. " sets time to " .. new_time)
 			return true, S("Time of day changed.")
 		end
@@ -1283,7 +1287,7 @@ local function handle_kill_command(killer, victim)
 			return false, S("@1 is already dead.", victim)
 		end
 	end
-	if not killer == victim then
+	if killer ~= victim then
 		core.log("action", string.format("%s killed %s", killer, victim))
 	end
 	-- Kill victim
diff --git a/builtin/game/features.lua b/builtin/game/features.lua
index 583ef5092..0d55bb01f 100644
--- a/builtin/game/features.lua
+++ b/builtin/game/features.lua
@@ -22,6 +22,7 @@ core.features = {
 	degrotate_240_steps = true,
 	abm_min_max_y = true,
 	dynamic_add_media_table = true,
+	get_sky_as_table = true,
 }
 
 function core.has_feature(arg)
diff --git a/builtin/game/init.lua b/builtin/game/init.lua
index 9a9966d7e..b9ab97b58 100644
--- a/builtin/game/init.lua
+++ b/builtin/game/init.lua
@@ -8,6 +8,7 @@ local gamepath   = scriptpath .. "game".. DIR_DELIM
 local builtin_shared = {}
 
 dofile(gamepath .. "constants.lua")
+dofile(gamepath .. "item_s.lua")
 assert(loadfile(gamepath .. "item.lua"))(builtin_shared)
 dofile(gamepath .. "register.lua")
 
@@ -19,6 +20,7 @@ dofile(commonpath .. "after.lua")
 dofile(commonpath .. "voxelarea.lua")
 dofile(gamepath .. "item_entity.lua")
 dofile(gamepath .. "deprecated.lua")
+dofile(gamepath .. "misc_s.lua")
 dofile(gamepath .. "misc.lua")
 dofile(gamepath .. "privileges.lua")
 dofile(gamepath .. "auth.lua")
@@ -32,5 +34,6 @@ dofile(gamepath .. "features.lua")
 dofile(gamepath .. "forceloading.lua")
 dofile(gamepath .. "statbars.lua")
 dofile(gamepath .. "knockback.lua")
+dofile(gamepath .. "async.lua")
 
 profiler = nil
diff --git a/builtin/game/item.lua b/builtin/game/item.lua
index 92818b177..5543e9a3f 100644
--- a/builtin/game/item.lua
+++ b/builtin/game/item.lua
@@ -15,144 +15,19 @@ end
 -- Item definition helpers
 --
 
-function core.dir_to_facedir(dir, is6d)
-	--account for y if requested
-	if is6d and math.abs(dir.y) > math.abs(dir.x) and math.abs(dir.y) > math.abs(dir.z) then
-
-		--from above
-		if dir.y < 0 then
-			if math.abs(dir.x) > math.abs(dir.z) then
-				if dir.x < 0 then
-					return 19
-				else
-					return 13
-				end
-			else
-				if dir.z < 0 then
-					return 10
-				else
-					return 4
-				end
-			end
-
-		--from below
-		else
-			if math.abs(dir.x) > math.abs(dir.z) then
-				if dir.x < 0 then
-					return 15
-				else
-					return 17
-				end
-			else
-				if dir.z < 0 then
-					return 6
-				else
-					return 8
-				end
-			end
-		end
-
-	--otherwise, place horizontally
-	elseif math.abs(dir.x) > math.abs(dir.z) then
-		if dir.x < 0 then
-			return 3
-		else
-			return 1
-		end
-	else
-		if dir.z < 0 then
-			return 2
-		else
-			return 0
-		end
-	end
-end
-
--- Table of possible dirs
-local facedir_to_dir = {
-	vector.new( 0,  0,  1),
-	vector.new( 1,  0,  0),
-	vector.new( 0,  0, -1),
-	vector.new(-1,  0,  0),
-	vector.new( 0, -1,  0),
-	vector.new( 0,  1,  0),
-}
--- Mapping from facedir value to index in facedir_to_dir.
-local facedir_to_dir_map = {
-	[0]=1, 2, 3, 4,
-	5, 2, 6, 4,
-	6, 2, 5, 4,
-	1, 5, 3, 6,
-	1, 6, 3, 5,
-	1, 4, 3, 2,
-}
-function core.facedir_to_dir(facedir)
-	return facedir_to_dir[facedir_to_dir_map[facedir % 32]]
-end
-
-function core.dir_to_wallmounted(dir)
-	if math.abs(dir.y) > math.max(math.abs(dir.x), math.abs(dir.z)) then
-		if dir.y < 0 then
-			return 1
-		else
-			return 0
-		end
-	elseif math.abs(dir.x) > math.abs(dir.z) then
-		if dir.x < 0 then
-			return 3
-		else
-			return 2
-		end
-	else
-		if dir.z < 0 then
-			return 5
-		else
-			return 4
+function core.get_pointed_thing_position(pointed_thing, above)
+	if pointed_thing.type == "node" then
+		if above then
+			-- The position where a node would be placed
+			return pointed_thing.above
 		end
+		-- The position where a node would be dug
+		return pointed_thing.under
+	elseif pointed_thing.type == "object" then
+		return pointed_thing.ref and pointed_thing.ref:get_pos()
 	end
 end
 
--- table of dirs in wallmounted order
-local wallmounted_to_dir = {
-	[0] = vector.new( 0,  1,  0),
-	vector.new( 0, -1,  0),
-	vector.new( 1,  0,  0),
-	vector.new(-1,  0,  0),
-	vector.new( 0,  0,  1),
-	vector.new( 0,  0, -1),
-}
-function core.wallmounted_to_dir(wallmounted)
-	return wallmounted_to_dir[wallmounted % 8]
-end
-
-function core.dir_to_yaw(dir)
-	return -math.atan2(dir.x, dir.z)
-end
-
-function core.yaw_to_dir(yaw)
-	return vector.new(-math.sin(yaw), 0, math.cos(yaw))
-end
-
-function core.is_colored_paramtype(ptype)
-	return (ptype == "color") or (ptype == "colorfacedir") or
-		(ptype == "colorwallmounted") or (ptype == "colordegrotate")
-end
-
-function core.strip_param2_color(param2, paramtype2)
-	if not core.is_colored_paramtype(paramtype2) then
-		return nil
-	end
-	if paramtype2 == "colorfacedir" then
-		param2 = math.floor(param2 / 32) * 32
-	elseif paramtype2 == "colorwallmounted" then
-		param2 = math.floor(param2 / 8) * 8
-	elseif paramtype2 == "colordegrotate" then
-		param2 = math.floor(param2 / 32) * 32
-	end
-	-- paramtype2 == "color" requires no modification.
-	return param2
-end
-
 local function has_all_groups(tbl, required_groups)
 	if type(required_groups) == "string" then
 		return (tbl[required_groups] or 0) ~= 0
@@ -477,34 +352,41 @@ function core.do_item_eat(hp_change, replace_with_item, itemstack, user, pointed
 			return result
 		end
 	end
+	-- read definition before potentially emptying the stack
 	local def = itemstack:get_definition()
-	if itemstack:take_item() ~= nil then
-		user:set_hp(user:get_hp() + hp_change)
-
-		if def and def.sound and def.sound.eat then
-			core.sound_play(def.sound.eat, {
-				pos = user:get_pos(),
-				max_hear_distance = 16
-			}, true)
-		end
+	if itemstack:take_item():is_empty() then
+		return itemstack
+	end
+
+	if def and def.sound and def.sound.eat then
+		core.sound_play(def.sound.eat, {
+			pos = user:get_pos(),
+			max_hear_distance = 16
+		}, true)
+	end
 
-		if replace_with_item then
-			if itemstack:is_empty() then
-				itemstack:add_item(replace_with_item)
+	-- Changing hp might kill the player causing mods to do who-knows-what to the
+	-- inventory, so do this before set_hp().
+	if replace_with_item then
+		if itemstack:is_empty() then
+			itemstack:add_item(replace_with_item)
+		else
+			local inv = user:get_inventory()
+			-- Check if inv is null, since non-players don't have one
+			if inv and inv:room_for_item("main", {name=replace_with_item}) then
+				inv:add_item("main", replace_with_item)
 			else
-				local inv = user:get_inventory()
-				-- Check if inv is null, since non-players don't have one
-				if inv and inv:room_for_item("main", {name=replace_with_item}) then
-					inv:add_item("main", replace_with_item)
-				else
-					local pos = user:get_pos()
-					pos.y = math.floor(pos.y + 0.5)
-					core.add_item(pos, replace_with_item)
-				end
+				local pos = user:get_pos()
+				pos.y = math.floor(pos.y + 0.5)
+				core.add_item(pos, replace_with_item)
 			end
 		end
 	end
-	return itemstack
+	user:set_wielded_item(itemstack)
+
+	user:set_hp(user:get_hp() + hp_change)
+
+	return nil -- don't overwrite wield item a second time
 end
 
 function core.item_eat(hp_change, replace_with_item)
@@ -585,7 +467,7 @@ function core.node_dig(pos, node, digger)
 	if wielded then
 		local wdef = wielded:get_definition()
 		local tp = wielded:get_tool_capabilities()
-		local dp = core.get_dig_params(def and def.groups, tp)
+		local dp = core.get_dig_params(def and def.groups, tp, wielded:get_wear())
 		if wdef and wdef.after_use then
 			wielded = wdef.after_use(wielded, digger, node, dp) or wielded
 		else
@@ -647,9 +529,7 @@ function core.node_dig(pos, node, digger)
 	-- Run script hook
 	for _, callback in ipairs(core.registered_on_dignodes) do
 		local origin = core.callback_origins[callback]
-		if origin then
-			core.set_last_run_mod(origin.mod)
-		end
+		core.set_last_run_mod(origin.mod)
 
 		-- Copy pos and node because callback can modify them
 		local pos_copy = vector.new(pos)
diff --git a/builtin/game/item_entity.lua b/builtin/game/item_entity.lua
index 9b1b23bfd..53f98a7c7 100644
--- a/builtin/game/item_entity.lua
+++ b/builtin/game/item_entity.lua
@@ -58,17 +58,21 @@ core.register_entity(":__builtin:item", {
 		local glow = def and def.light_source and
 			math.floor(def.light_source / 2 + 0.5)
 
+		local size_bias = 1e-3 * math.random() -- small random bias to counter Z-fighting
+		local c = {-size, -size, -size, size, size, size}
 		self.object:set_properties({
 			is_visible = true,
 			visual = "wielditem",
 			textures = {itemname},
-			visual_size = {x = size, y = size},
-			collisionbox = {-size, -size, -size, size, size, size},
+			visual_size = {x = size + size_bias, y = size + size_bias},
+			collisionbox = c,
 			automatic_rotate = math.pi * 0.5 * 0.2 / size,
 			wield_item = self.itemstring,
 			glow = glow,
 		})
 
+		-- cache for usage in on_step
+		self._collisionbox = c
 	end,
 
 	get_staticdata = function(self)
@@ -93,6 +97,7 @@ core.register_entity(":__builtin:item", {
 		self.object:set_armor_groups({immortal = 1})
 		self.object:set_velocity({x = 0, y = 2, z = 0})
 		self.object:set_acceleration({x = 0, y = -gravity, z = 0})
+		self._collisionbox = self.initial_properties.collisionbox
 		self:set_item()
 	end,
 
@@ -163,7 +168,7 @@ core.register_entity(":__builtin:item", {
 		local pos = self.object:get_pos()
 		local node = core.get_node_or_nil({
 			x = pos.x,
-			y = pos.y + self.object:get_properties().collisionbox[2] - 0.05,
+			y = pos.y + self._collisionbox[2] - 0.05,
 			z = pos.z
 		})
 		-- Delete in 'ignore' nodes
@@ -176,7 +181,7 @@ core.register_entity(":__builtin:item", {
 		if self.force_out then
 			-- This code runs after the entity got a push from the is_stuck code.
 			-- It makes sure the entity is entirely outside the solid node
-			local c = self.object:get_properties().collisionbox
+			local c = self._collisionbox
 			local s = self.force_out_start
 			local f = self.force_out
 			local ok = (f.x > 0 and pos.x + c[1] > s.x + 0.5) or
diff --git a/builtin/game/item_s.lua b/builtin/game/item_s.lua
new file mode 100644
index 000000000..a51cd0a1c
--- /dev/null
+++ b/builtin/game/item_s.lua
@@ -0,0 +1,156 @@
+-- Minetest: builtin/item_s.lua
+-- The distinction of what goes here is a bit tricky, basically it's everything
+-- that does not (directly or indirectly) need access to ServerEnvironment,
+-- Server or writable access to IGameDef on the engine side.
+-- (The '_s' stands for standalone.)
+
+--
+-- Item definition helpers
+--
+
+function core.inventorycube(img1, img2, img3)
+	img2 = img2 or img1
+	img3 = img3 or img1
+	return "[inventorycube"
+			.. "{" .. img1:gsub("%^", "&")
+			.. "{" .. img2:gsub("%^", "&")
+			.. "{" .. img3:gsub("%^", "&")
+end
+
+function core.dir_to_facedir(dir, is6d)
+	--account for y if requested
+	if is6d and math.abs(dir.y) > math.abs(dir.x) and math.abs(dir.y) > math.abs(dir.z) then
+
+		--from above
+		if dir.y < 0 then
+			if math.abs(dir.x) > math.abs(dir.z) then
+				if dir.x < 0 then
+					return 19
+				else
+					return 13
+				end
+			else
+				if dir.z < 0 then
+					return 10
+				else
+					return 4
+				end
+			end
+
+		--from below
+		else
+			if math.abs(dir.x) > math.abs(dir.z) then
+				if dir.x < 0 then
+					return 15
+				else
+					return 17
+				end
+			else
+				if dir.z < 0 then
+					return 6
+				else
+					return 8
+				end
+			end
+		end
+
+	--otherwise, place horizontally
+	elseif math.abs(dir.x) > math.abs(dir.z) then
+		if dir.x < 0 then
+			return 3
+		else
+			return 1
+		end
+	else
+		if dir.z < 0 then
+			return 2
+		else
+			return 0
+		end
+	end
+end
+
+-- Table of possible dirs
+local facedir_to_dir = {
+	vector.new( 0,  0,  1),
+	vector.new( 1,  0,  0),
+	vector.new( 0,  0, -1),
+	vector.new(-1,  0,  0),
+	vector.new( 0, -1,  0),
+	vector.new( 0,  1,  0),
+}
+-- Mapping from facedir value to index in facedir_to_dir.
+local facedir_to_dir_map = {
+	[0]=1, 2, 3, 4,
+	5, 2, 6, 4,
+	6, 2, 5, 4,
+	1, 5, 3, 6,
+	1, 6, 3, 5,
+	1, 4, 3, 2,
+}
+function core.facedir_to_dir(facedir)
+	return facedir_to_dir[facedir_to_dir_map[facedir % 32]]
+end
+
+function core.dir_to_wallmounted(dir)
+	if math.abs(dir.y) > math.max(math.abs(dir.x), math.abs(dir.z)) then
+		if dir.y < 0 then
+			return 1
+		else
+			return 0
+		end
+	elseif math.abs(dir.x) > math.abs(dir.z) then
+		if dir.x < 0 then
+			return 3
+		else
+			return 2
+		end
+	else
+		if dir.z < 0 then
+			return 5
+		else
+			return 4
+		end
+	end
+end
+
+-- table of dirs in wallmounted order
+local wallmounted_to_dir = {
+	[0] = vector.new( 0,  1,  0),
+	vector.new( 0, -1,  0),
+	vector.new( 1,  0,  0),
+	vector.new(-1,  0,  0),
+	vector.new( 0,  0,  1),
+	vector.new( 0,  0, -1),
+}
+function core.wallmounted_to_dir(wallmounted)
+	return wallmounted_to_dir[wallmounted % 8]
+end
+
+function core.dir_to_yaw(dir)
+	return -math.atan2(dir.x, dir.z)
+end
+
+function core.yaw_to_dir(yaw)
+	return vector.new(-math.sin(yaw), 0, math.cos(yaw))
+end
+
+function core.is_colored_paramtype(ptype)
+	return (ptype == "color") or (ptype == "colorfacedir") or
+		(ptype == "colorwallmounted") or (ptype == "colordegrotate")
+end
+
+function core.strip_param2_color(param2, paramtype2)
+	if not core.is_colored_paramtype(paramtype2) then
+		return nil
+	end
+	if paramtype2 == "colorfacedir" then
+		param2 = math.floor(param2 / 32) * 32
+	elseif paramtype2 == "colorwallmounted" then
+		param2 = math.floor(param2 / 8) * 8
+	elseif paramtype2 == "colordegrotate" then
+		param2 = math.floor(param2 / 32) * 32
+	end
+	-- paramtype2 == "color" requires no modification.
+	return param2
+end
diff --git a/builtin/game/misc.lua b/builtin/game/misc.lua
index 63d64817c..997b1894a 100644
--- a/builtin/game/misc.lua
+++ b/builtin/game/misc.lua
@@ -6,6 +6,16 @@ local S = core.get_translator("__builtin")
 -- Misc. API functions
 --
 
+-- @spec core.kick_player(String, String) :: Boolean
+function core.kick_player(player_name, reason)
+	if type(reason) == "string" then
+		reason = "Kicked: " .. reason
+	else
+		reason = "Kicked."
+	end
+	return core.disconnect_player(player_name, reason)
+end
+
 function core.check_player_privs(name, ...)
 	if core.is_player(name) then
 		name = name:get_player_name()
@@ -111,53 +121,6 @@ function core.get_player_radius_area(player_name, radius)
 end
 
 
-function core.hash_node_position(pos)
-	return (pos.z + 32768) * 65536 * 65536
-		 + (pos.y + 32768) * 65536
-		 +  pos.x + 32768
-end
-
-
-function core.get_position_from_hash(hash)
-	local x = (hash % 65536) - 32768
-	hash  = math.floor(hash / 65536)
-	local y = (hash % 65536) - 32768
-	hash  = math.floor(hash / 65536)
-	local z = (hash % 65536) - 32768
-	return vector.new(x, y, z)
-end
-
-
-function core.get_item_group(name, group)
-	if not core.registered_items[name] or not
-			core.registered_items[name].groups[group] then
-		return 0
-	end
-	return core.registered_items[name].groups[group]
-end
-
-
-function core.get_node_group(name, group)
-	core.log("deprecated", "Deprecated usage of get_node_group, use get_item_group instead")
-	return core.get_item_group(name, group)
-end
-
-
-function core.setting_get_pos(name)
-	local value = core.settings:get(name)
-	if not value then
-		return nil
-	end
-	return core.string_to_pos(value)
-end
-
-
--- See l_env.cpp for the other functions
-function core.get_artificial_light(param1)
-	return math.floor(param1 / 16)
-end
-
-
 -- To be overriden by protection mods
 
 function core.is_protected(pos, name)
@@ -240,7 +203,7 @@ end
 
 -- HTTP callback interface
 
-function core.http_add_fetch(httpenv)
+core.set_http_api_lua(function(httpenv)
 	httpenv.fetch = function(req, callback)
 		local handle = httpenv.fetch_async(req)
 
@@ -256,7 +219,8 @@ function core.http_add_fetch(httpenv)
 	end
 
 	return httpenv
-end
+end)
+core.set_http_api_lua = nil
 
 
 function core.close_formspec(player_name, formname)
@@ -273,40 +237,30 @@ end
 core.dynamic_media_callbacks = {}
 
 
--- PNG encoder safety wrapper
-
-local o_encode_png = core.encode_png
-function core.encode_png(width, height, data, compression)
-	if type(width) ~= "number" then
-		error("Incorrect type for 'width', expected number, got " .. type(width))
-	end
-	if type(height) ~= "number" then
-		error("Incorrect type for 'height', expected number, got " .. type(height))
-	end
-
-	local expected_byte_count = width * height * 4
+-- Transfer of certain globals into async environment
+-- see builtin/async/game.lua for the other side
 
-	if type(data) ~= "table" and type(data) ~= "string" then
-		error("Incorrect type for 'height', expected table or string, got " .. type(height))
+local function copy_filtering(t, seen)
+	if type(t) == "userdata" or type(t) == "function" then
+		return true -- don't use nil so presence can still be detected
+	elseif type(t) ~= "table" then
+		return t
 	end
-
-	local data_length = type(data) == "table" and #data * 4 or string.len(data)
-
-	if data_length ~= expected_byte_count then
-		error(string.format(
-			"Incorrect length of 'data', width and height imply %d bytes but %d were provided",
-			expected_byte_count,
-			data_length
-		))
-	end
-
-	if type(data) == "table" then
-		local dataBuf = {}
-		for i = 1, #data do
-			dataBuf[i] = core.colorspec_to_bytes(data[i])
-		end
-		data = table.concat(dataBuf)
+	local n = {}
+	seen = seen or {}
+	seen[t] = n
+	for k, v in pairs(t) do
+		local k_ = seen[k] or copy_filtering(k, seen)
+		local v_ = seen[v] or copy_filtering(v, seen)
+		n[k_] = v_
 	end
+	return n
+end
 
-	return o_encode_png(width, height, data, compression or 6)
+function core.get_globals_to_transfer()
+	local all = {
+		registered_items = copy_filtering(core.registered_items),
+		registered_aliases = core.registered_aliases,
+	}
+	return all
 end
diff --git a/builtin/game/misc_s.lua b/builtin/game/misc_s.lua
new file mode 100644
index 000000000..67a0ec684
--- /dev/null
+++ b/builtin/game/misc_s.lua
@@ -0,0 +1,93 @@
+-- Minetest: builtin/misc_s.lua
+-- The distinction of what goes here is a bit tricky, basically it's everything
+-- that does not (directly or indirectly) need access to ServerEnvironment,
+-- Server or writable access to IGameDef on the engine side.
+-- (The '_s' stands for standalone.)
+
+--
+-- Misc. API functions
+--
+
+function core.hash_node_position(pos)
+	return (pos.z + 32768) * 65536 * 65536
+		 + (pos.y + 32768) * 65536
+		 +  pos.x + 32768
+end
+
+
+function core.get_position_from_hash(hash)
+	local x = (hash % 65536) - 32768
+	hash  = math.floor(hash / 65536)
+	local y = (hash % 65536) - 32768
+	hash  = math.floor(hash / 65536)
+	local z = (hash % 65536) - 32768
+	return vector.new(x, y, z)
+end
+
+
+function core.get_item_group(name, group)
+	if not core.registered_items[name] or not
+			core.registered_items[name].groups[group] then
+		return 0
+	end
+	return core.registered_items[name].groups[group]
+end
+
+
+function core.get_node_group(name, group)
+	core.log("deprecated", "Deprecated usage of get_node_group, use get_item_group instead")
+	return core.get_item_group(name, group)
+end
+
+
+function core.setting_get_pos(name)
+	local value = core.settings:get(name)
+	if not value then
+		return nil
+	end
+	return core.string_to_pos(value)
+end
+
+
+-- See l_env.cpp for the other functions
+function core.get_artificial_light(param1)
+	return math.floor(param1 / 16)
+end
+
+-- PNG encoder safety wrapper
+
+local o_encode_png = core.encode_png
+function core.encode_png(width, height, data, compression)
+	if type(width) ~= "number" then
+		error("Incorrect type for 'width', expected number, got " .. type(width))
+	end
+	if type(height) ~= "number" then
+		error("Incorrect type for 'height', expected number, got " .. type(height))
+	end
+
+	local expected_byte_count = width * height * 4
+
+	if type(data) ~= "table" and type(data) ~= "string" then
+		error("Incorrect type for 'data', expected table or string, got " .. type(data))
+	end
+
+	local data_length = type(data) == "table" and #data * 4 or string.len(data)
+
+	if data_length ~= expected_byte_count then
+		error(string.format(
+			"Incorrect length of 'data', width and height imply %d bytes but %d were provided",
+			expected_byte_count,
+			data_length
+		))
+	end
+
+	if type(data) == "table" then
+		local dataBuf = {}
+		for i = 1, #data do
+			dataBuf[i] = core.colorspec_to_bytes(data[i])
+		end
+		data = table.concat(dataBuf)
+	end
+
+	return o_encode_png(width, height, data, compression or 6)
+end
diff --git a/builtin/game/privileges.lua b/builtin/game/privileges.lua
index 97681655e..2ff4c093c 100644
--- a/builtin/game/privileges.lua
+++ b/builtin/game/privileges.lua
@@ -97,10 +97,6 @@ core.register_privilege("rollback", {
 	description = S("Can use the rollback functionality"),
 	give_to_singleplayer = false,
 })
-core.register_privilege("basic_debug", {
-	description = S("Can view more debug info that might give a gameplay advantage"),
-	give_to_singleplayer = false,
-})
 core.register_privilege("debug", {
 	description = S("Can enable wireframe"),
 	give_to_singleplayer = false,
diff --git a/builtin/game/register.lua b/builtin/game/register.lua
index 56e40c75c..0be107c36 100644
--- a/builtin/game/register.lua
+++ b/builtin/game/register.lua
@@ -403,8 +403,14 @@ function core.override_item(name, redefinition)
 	register_item_raw(item)
 end
 
-
-core.callback_origins = {}
+do
+	local default = {mod = "??", name = "??"}
+	core.callback_origins = setmetatable({}, {
+		__index = function()
+			return default
+		end
+	})
+end
 
 function core.run_callbacks(callbacks, mode, ...)
 	assert(type(callbacks) == "table")
@@ -419,9 +425,7 @@ function core.run_callbacks(callbacks, mode, ...)
 	local ret = nil
 	for i = 1, cb_len do
 		local origin = core.callback_origins[callbacks[i]]
-		if origin then
-			core.set_last_run_mod(origin.mod)
-		end
+		core.set_last_run_mod(origin.mod)
 		local cb_ret = callbacks[i](...)
 
 		if mode == 0 and i == 1 then
diff --git a/builtin/game/statbars.lua b/builtin/game/statbars.lua
index db5087a16..cb7ff7b76 100644
--- a/builtin/game/statbars.lua
+++ b/builtin/game/statbars.lua
@@ -1,39 +1,39 @@
 -- cache setting
 local enable_damage = core.settings:get_bool("enable_damage")
 
-local health_bar_definition = {
-	hud_elem_type = "statbar",
-	position = {x = 0.5, y = 1},
-	text = "heart.png",
-	text2 = "heart_gone.png",
-	number = core.PLAYER_MAX_HP_DEFAULT,
-	item = core.PLAYER_MAX_HP_DEFAULT,
-	direction = 0,
-	size = {x = 24, y = 24},
-	offset = {x = (-10 * 24) - 25, y = -(48 + 24 + 16)},
-}
-
-local breath_bar_definition = {
-	hud_elem_type = "statbar",
-	position = {x = 0.5, y = 1},
-	text = "bubble.png",
-	text2 = "bubble_gone.png",
-	number = core.PLAYER_MAX_BREATH_DEFAULT,
-	item = core.PLAYER_MAX_BREATH_DEFAULT * 2,
-	direction = 0,
-	size = {x = 24, y = 24},
-	offset = {x = 25, y= -(48 + 24 + 16)},
+local bar_definitions = {
+	hp = {
+		hud_elem_type = "statbar",
+		position = {x = 0.5, y = 1},
+		text = "heart.png",
+		text2 = "heart_gone.png",
+		number = core.PLAYER_MAX_HP_DEFAULT,
+		item = core.PLAYER_MAX_HP_DEFAULT,
+		direction = 0,
+		size = {x = 24, y = 24},
+		offset = {x = (-10 * 24) - 25, y = -(48 + 24 + 16)},
+	},
+	breath = {
+		hud_elem_type = "statbar",
+		position = {x = 0.5, y = 1},
+		text = "bubble.png",
+		text2 = "bubble_gone.png",
+		number = core.PLAYER_MAX_BREATH_DEFAULT * 2,
+		item = core.PLAYER_MAX_BREATH_DEFAULT * 2,
+		direction = 0,
+		size = {x = 24, y = 24},
+		offset = {x = 25, y= -(48 + 24 + 16)},
+	},
 }
 
 local hud_ids = {}
 
-local function scaleToDefault(player, field)
-	-- Scale "hp" or "breath" to the default dimensions
+local function scaleToHudMax(player, field)
+	-- Scale "hp" or "breath" to the hud maximum dimensions
 	local current = player["get_" .. field](player)
-	local nominal = core["PLAYER_MAX_" .. field:upper() .. "_DEFAULT"]
-	local max_display = math.max(nominal,
-		math.max(player:get_properties()[field .. "_max"], current))
-	return current / max_display * nominal
+	local nominal = bar_definitions[field].item
+	local max_display = math.max(player:get_properties()[field .. "_max"], current)
+	return math.ceil(current / max_display * nominal)
 end
 
 local function update_builtin_statbars(player)
@@ -55,9 +55,9 @@ local function update_builtin_statbars(player)
 	local immortal = player:get_armor_groups().immortal == 1
 
 	if flags.healthbar and enable_damage and not immortal then
-		local number = scaleToDefault(player, "hp")
+		local number = scaleToHudMax(player, "hp")
 		if hud.id_healthbar == nil then
-			local hud_def = table.copy(health_bar_definition)
+			local hud_def = table.copy(bar_definitions.hp)
 			hud_def.number = number
 			hud.id_healthbar = player:hud_add(hud_def)
 		else
@@ -73,9 +73,9 @@ local function update_builtin_statbars(player)
 	local breath     = player:get_breath()
 	local breath_max = player:get_properties().breath_max
 	if show_breathbar and breath <= breath_max then
-		local number = 2 * scaleToDefault(player, "breath")
+		local number = scaleToHudMax(player, "breath")
 		if not hud.id_breathbar and breath < breath_max then
-			local hud_def = table.copy(breath_bar_definition)
+			local hud_def = table.copy(bar_definitions.breath)
 			hud_def.number = number
 			hud.id_breathbar = player:hud_add(hud_def)
 		elseif hud.id_breathbar then
@@ -145,7 +145,7 @@ function core.hud_replace_builtin(hud_name, definition)
 	end
 
 	if hud_name == "health" then
-		health_bar_definition = definition
+		bar_definitions.hp = definition
 
 		for name, ids in pairs(hud_ids) do
 			local player = core.get_player_by_name(name)
@@ -159,7 +159,7 @@ function core.hud_replace_builtin(hud_name, definition)
 	end
 
 	if hud_name == "breath" then
-		breath_bar_definition = definition
+		bar_definitions.breath = definition
 
 		for name, ids in pairs(hud_ids) do
 			local player = core.get_player_by_name(name)
diff --git a/builtin/init.lua b/builtin/init.lua
index 8bb69a33d..fd176e942 100644
--- a/builtin/init.lua
+++ b/builtin/init.lua
@@ -55,8 +55,10 @@ elseif INIT == "mainmenu" then
 	if not custom_loaded then
 		dofile(core.get_mainmenu_path() .. DIR_DELIM .. "init.lua")
 	end
-elseif INIT == "async" then
-	dofile(asyncpath .. "init.lua")
+elseif INIT == "async"  then
+	dofile(asyncpath .. "mainmenu.lua")
+elseif INIT == "async_game" then
+	dofile(asyncpath .. "game.lua")
 elseif INIT == "client" then
 	dofile(clientpath .. "init.lua")
 else
diff --git a/builtin/locale/__builtin.de.tr b/builtin/locale/__builtin.de.tr
index aa40ffc8d..1b29f81e7 100644
--- a/builtin/locale/__builtin.de.tr
+++ b/builtin/locale/__builtin.de.tr
@@ -139,7 +139,7 @@ This command was disabled by a mod or game.=Dieser Befehl wurde von einer Mod od
 Show or set time of day=Tageszeit anzeigen oder setzen
 Current time is @1:@2.=Es ist jetzt @1:@2 Uhr.
 You don't have permission to run this command (missing privilege: @1).=Sie haben nicht die Erlaubnis, diesen Befehl auszuführen (fehlendes Privileg: @1).
-Invalid time.=Ungültige Zeit.
+Invalid time (must be between 0 and 24000).=Ungültige Zeit (muss zwischen 0 und 24000 liegen).
 Time of day changed.=Tageszeit geändert.
 Invalid hour (must be between 0 and 23 inclusive).=Ungültige Stunde (muss zwischen 0 und 23 inklusive liegen).
 Invalid minute (must be between 0 and 59 inclusive).=Ungültige Minute (muss zwischen 0 und 59 inklusive liegen).
@@ -187,12 +187,14 @@ You are already dead.=Sie sind schon tot.
 @1 is already dead.=@1 ist bereits tot.
 @1 has been killed.=@1 wurde getötet.
 Kill player or yourself=Einen Spieler oder Sie selbst töten
+Invalid parameters (see /help @1).=Ungültige Parameter (siehe „/help @1“).
+Too many arguments, try using just /help <command>=Zu viele Argumente. Probieren Sie es mit „/help <Befehl>“
 Available commands: @1=Verfügbare Befehle: @1
 Use '/help <cmd>' to get more information, or '/help all' to list everything.=„/help <Befehl>“ benutzen, um mehr Informationen zu erhalten, oder „/help all“, um alles aufzulisten.
 Available commands:=Verfügbare Befehle:
 Command not available: @1=Befehl nicht verfügbar: @1
-[all | privs | <cmd>]=[all | privs | <Befehl>]
-Get help for commands or list privileges=Hilfe für Befehle erhalten oder Privilegien auflisten
+[all | privs | <cmd>] [-t]=[all | privs | <Befehl>] [-t]
+Get help for commands or list privileges (-t: output in chat)=Hilfe für Befehle erhalten oder Privilegien auflisten (-t: Ausgabe im Chat)
 Available privileges:=Verfügbare Privilegien:
 Command=Befehl
 Parameters=Parameter
@@ -230,7 +232,8 @@ Can use fly mode=Kann den Flugmodus benutzen
 Can use fast mode=Kann den Schnellmodus benutzen
 Can fly through solid nodes using noclip mode=Kann durch feste Blöcke mit dem Geistmodus fliegen
 Can use the rollback functionality=Kann die Rollback-Funktionalität benutzen
-Allows enabling various debug options that may affect gameplay=Erlaubt die Aktivierung diverser Debugoptionen, die das Spielgeschehen beeinflussen könnten
+Can view more debug info that might give a gameplay advantage=Kann zusätzliche Debuginformationen betrachten, welche einen spielerischen Vorteil geben könnten
+Can enable wireframe=Kann Drahtmodell aktivieren
 Unknown Item=Unbekannter Gegenstand
 Air=Luft
 Ignore=Ignorieren
diff --git a/builtin/locale/__builtin.it.tr b/builtin/locale/__builtin.it.tr
index 449c2b85e..77f85c766 100644
--- a/builtin/locale/__builtin.it.tr
+++ b/builtin/locale/__builtin.it.tr
@@ -139,7 +139,7 @@ This command was disabled by a mod or game.=Questo comando è stato disabilitato
 Show or set time of day=Mostra o imposta l'orario della giornata
 Current time is @1:@2.=Orario corrente: @1:@2.
 You don't have permission to run this command (missing privilege: @1).=Non hai il permesso di eseguire questo comando (privilegio mancante: @1) 
-Invalid time.=Orario non valido.
+Invalid time (must be between 0 and 24000).=
 Time of day changed.=Orario della giornata cambiato.
 Invalid hour (must be between 0 and 23 inclusive).=Ora non valida (deve essere tra 0 e 23 inclusi)
 Invalid minute (must be between 0 and 59 inclusive).=Minuto non valido (deve essere tra 0 e 59 inclusi)
@@ -187,12 +187,14 @@ You are already dead.=Sei già mortǝ.
 @1 is already dead.=@1 è già mortǝ.
 @1 has been killed.=@1 è stato uccisǝ.
 Kill player or yourself=Uccide un giocatore o te stessǝ
+Invalid parameters (see /help @1).=
+Too many arguments, try using just /help <command>=
 Available commands: @1=Comandi disponibili: @1
 Use '/help <cmd>' to get more information, or '/help all' to list everything.=Usa '/help <comando>' per ottenere più informazioni, o '/help all' per elencare tutti i comandi.
 Available commands:=Comandi disponibili:
 Command not available: @1=Comando non disponibile: @1
-[all | privs | <cmd>]=[all | privs | <comando>]
-Get help for commands or list privileges=Richiama la finestra d'aiuto dei comandi o dei privilegi
+[all | privs | <cmd>] [-t]=
+Get help for commands or list privileges (-t: output in chat)=
 Available privileges:=Privilegi disponibili:
 Command=Comando
 Parameters=Parametri
@@ -230,7 +232,8 @@ Can use fly mode=Si può usare la modalità volo
 Can use fast mode=Si può usare la modalità rapida
 Can fly through solid nodes using noclip mode=Si può volare attraverso i nodi solidi con la modalità incorporea
 Can use the rollback functionality=Si può usare la funzione di rollback
-Allows enabling various debug options that may affect gameplay=Permette di abilitare varie opzioni di debug che potrebbero influenzare l'esperienza di gioco
+Can view more debug info that might give a gameplay advantage=
+Can enable wireframe=
 Unknown Item=Oggetto sconosciuto
 Air=Aria
 Ignore=Ignora
@@ -244,6 +247,10 @@ Profile saved to @1=
 
 ##### not used anymore #####
 
+Invalid time.=Orario non valido.
+[all | privs | <cmd>]=[all | privs | <comando>]
+Get help for commands or list privileges=Richiama la finestra d'aiuto dei comandi o dei privilegi
+Allows enabling various debug options that may affect gameplay=Permette di abilitare varie opzioni di debug che potrebbero influenzare l'esperienza di gioco
 [<delay_in_seconds> | -1] [reconnect] [<message>]=[<ritardo_in_secondi> | -1] [reconnect] [<messaggio>]
 Shutdown server (-1 cancels a delayed shutdown)=Arresta il server (-1 annulla un arresto programmato)
 <name> (<privilege> | all)=<nome> (<privilegio> | all)
diff --git a/builtin/locale/template.txt b/builtin/locale/template.txt
index 7049dde36..308d17f37 100644
--- a/builtin/locale/template.txt
+++ b/builtin/locale/template.txt
@@ -139,7 +139,7 @@ This command was disabled by a mod or game.=
 Show or set time of day=
 Current time is @1:@2.=
 You don't have permission to run this command (missing privilege: @1).=
-Invalid time.=
+Invalid time (must be between 0 and 24000).=
 Time of day changed.=
 Invalid hour (must be between 0 and 23 inclusive).=
 Invalid minute (must be between 0 and 59 inclusive).=
@@ -187,12 +187,14 @@ You are already dead.=
 @1 is already dead.=
 @1 has been killed.=
 Kill player or yourself=
+Invalid parameters (see /help @1).=
+Too many arguments, try using just /help <command>=
 Available commands: @1=
 Use '/help <cmd>' to get more information, or '/help all' to list everything.=
 Available commands:=
 Command not available: @1=
-[all | privs | <cmd>]=
-Get help for commands or list privileges=
+[all | privs | <cmd>] [-t]=
+Get help for commands or list privileges (-t: output in chat)=
 Available privileges:=
 Command=
 Parameters=
@@ -230,7 +232,8 @@ Can use fly mode=
 Can use fast mode=
 Can fly through solid nodes using noclip mode=
 Can use the rollback functionality=
-Allows enabling various debug options that may affect gameplay=
+Can view more debug info that might give a gameplay advantage=
+Can enable wireframe=
 Unknown Item=
 Air=
 Ignore=
diff --git a/builtin/mainmenu/common.lua b/builtin/mainmenu/common.lua
index 6db351048..8db8bb8d1 100644
--- a/builtin/mainmenu/common.lua
+++ b/builtin/mainmenu/common.lua
@@ -119,31 +119,27 @@ function render_serverlist_row(spec)
 
 	return table.concat(details, ",")
 end
-
---------------------------------------------------------------------------------
-os.tempfolder = function()
-	local temp = core.get_temp_path()
-	return temp .. DIR_DELIM .. "MT_" .. math.random(0, 10000)
-end
-
+---------------------------------------------------------------------------------
 os.tmpname = function()
-	local path = os.tempfolder()
-	io.open(path, "w"):close()
-	return path
+	error('do not use') -- instead use core.get_temp_path()
 end
 --------------------------------------------------------------------------------
 
-function menu_render_worldlist()
-	local retval = ""
+function menu_render_worldlist(show_gameid)
+	local retval = {}
 	local current_worldlist = menudata.worldlist:get_list()
 
+	local row
 	for i, v in ipairs(current_worldlist) do
-		if retval ~= "" then retval = retval .. "," end
-		retval = retval .. core.formspec_escape(v.name) ..
-				" \\[" .. core.formspec_escape(v.gameid) .. "\\]"
+		row = v.name
+		if show_gameid == nil or show_gameid == true then
+			row = row .. " [" .. v.gameid .. "]"
+		end
+		retval[#retval+1] = core.formspec_escape(row)
+
 	end
 
-	return retval
+	return table.concat(retval, ",")
 end
 
 function menu_handle_key_up_down(fields, textlist, settingname)
diff --git a/builtin/mainmenu/dlg_config_world.lua b/builtin/mainmenu/dlg_config_world.lua
index 9bdf92a74..f73256612 100644
--- a/builtin/mainmenu/dlg_config_world.lua
+++ b/builtin/mainmenu/dlg_config_world.lua
@@ -163,10 +163,13 @@ local function get_formspec(data)
 			"button[8.95,0.125;2.5,0.5;btn_enable_all_mods;" ..
 			fgettext("Enable all") .. "]"
 	end
+
+	local use_technical_names = core.settings:get_bool("show_technical_names")
+
 	return retval ..
 		"tablecolumns[color;tree;text]" ..
 		"table[5.5,0.75;5.75,6;world_config_modlist;" ..
-		pkgmgr.render_packagelist(data.list) .. ";" .. data.selected_mod .."]"
+		pkgmgr.render_packagelist(data.list, use_technical_names) .. ";" .. data.selected_mod .."]"
 end
 
 local function handle_buttons(this, fields)
@@ -205,14 +208,19 @@ local function handle_buttons(this, fields)
 		local mods = worldfile:to_table()
 
 		local rawlist = this.data.list:get_raw_list()
+		local was_set = {}
 
 		for i = 1, #rawlist do
 			local mod = rawlist[i]
 			if not mod.is_modpack and
 					not mod.is_game_content then
 				if modname_valid(mod.name) then
-					worldfile:set("load_mod_" .. mod.name,
-						mod.enabled and "true" or "false")
+					if mod.enabled then
+						worldfile:set("load_mod_" .. mod.name, mod.virtual_path)
+						was_set[mod.name] = true
+					elseif not was_set[mod.name] then
+						worldfile:set("load_mod_" .. mod.name, "false")
+					end
 				elseif mod.enabled then
 					gamedata.errormessage = fgettext_ne("Failed to enable mo" ..
 							"d \"$1\" as it contains disallowed characters. " ..
@@ -256,12 +264,26 @@ local function handle_buttons(this, fields)
 	if fields.btn_enable_all_mods then
 		local list = this.data.list:get_raw_list()
 
+		-- When multiple copies of a mod are installed, we need to avoid enabling multiple of them
+		-- at a time. So lets first collect all the enabled mods, and then use this to exclude
+		-- multiple enables.
+
+		local was_enabled = {}
 		for i = 1, #list do
 			if not list[i].is_game_content
-					and not list[i].is_modpack then
+					and not list[i].is_modpack and list[i].enabled then
+				was_enabled[list[i].name] = true
+			end
+		end
+
+		for i = 1, #list do
+			if not list[i].is_game_content and not list[i].is_modpack and
+					not was_enabled[list[i].name] then
 				list[i].enabled = true
+				was_enabled[list[i].name] = true
 			end
 		end
+
 		enabled_all = true
 		return true
 	end
diff --git a/builtin/mainmenu/dlg_contentstore.lua b/builtin/mainmenu/dlg_contentstore.lua
index 790da03ba..ff32c8c9f 100644
--- a/builtin/mainmenu/dlg_contentstore.lua
+++ b/builtin/mainmenu/dlg_contentstore.lua
@@ -25,7 +25,7 @@ end
 
 -- Unordered preserves the original order of the ContentDB API,
 -- before the package list is ordered based on installed state.
-local store = { packages = {}, packages_full = {}, packages_full_unordered = {} }
+local store = { packages = {}, packages_full = {}, packages_full_unordered = {}, aliases = {} }
 
 local http = core.get_http_api()
 
@@ -62,9 +62,19 @@ local REASON_UPDATE = "update"
 local REASON_DEPENDENCY = "dependency"
 
 
+-- encodes for use as URL parameter or path component
+local function urlencode(str)
+	return str:gsub("[^%a%d()._~-]", function(char)
+		return string.format("%%%02X", string.byte(char))
+	end)
+end
+assert(urlencode("sample text?") == "sample%20text%3F")
+
+
 local function get_download_url(package, reason)
 	local base_url = core.settings:get("contentdb_url")
-	local ret = base_url .. ("/packages/%s/%s/releases/%d/download/"):format(package.author, package.name, package.release)
+	local ret = base_url .. ("/packages/%s/releases/%d/download/"):format(
+		package.url_part, package.release)
 	if reason then
 		ret = ret .. "?reason=" .. reason
 	end
@@ -72,34 +82,52 @@ local function get_download_url(package, reason)
 end
 
 
-local function download_package(param)
-	if core.download_file(param.url, param.filename) then
+local function download_and_extract(param)
+	local package = param.package
+
+	local filename = core.get_temp_path(true)
+	if filename == "" or not core.download_file(param.url, filename) then
+		core.log("error", "Downloading " .. dump(param.url) .. " failed")
 		return {
-			filename = param.filename,
-			successful = true,
+			msg = fgettext("Failed to download $1", package.name)
 		}
+	end
+
+	local tempfolder = core.get_temp_path()
+	if tempfolder ~= "" then
+		tempfolder = tempfolder .. DIR_DELIM .. "MT_" .. math.random(1, 1024000)
+		if not core.extract_zip(filename, tempfolder) then
+			tempfolder = nil
+		end
 	else
-		core.log("error", "downloading " .. dump(param.url) .. " failed")
+		tempfolder = nil
+	end
+	os.remove(filename)
+	if not tempfolder then
 		return {
-			successful = false,
+			msg = fgettext("Install: Unsupported file type or broken archive"),
 		}
 	end
+
+	return {
+		path = tempfolder
+	}
 end
 
 local function start_install(package, reason)
 	local params = {
 		package = package,
 		url = get_download_url(package, reason),
-		filename = os.tempfolder() .. "_MODNAME_" .. package.name .. ".zip",
 	}
 
 	number_downloading = number_downloading + 1
 
 	local function callback(result)
-		if result.successful then
-			local path, msg = pkgmgr.install(package.type,
-					result.filename, package.name,
-					package.path)
+		if result.msg then
+			gamedata.errormessage = result.msg
+		else
+			local path, msg = pkgmgr.install_dir(package.type, result.path, package.name, package.path)
+			core.delete_dir(result.path)
 			if not path then
 				gamedata.errormessage = msg
 			else
@@ -137,9 +165,6 @@ local function start_install(package, reason)
 					conf:write()
 				end
 			end
-			os.remove(result.filename)
-		else
-			gamedata.errormessage = fgettext("Failed to download $1", package.name)
 		end
 
 		package.downloading = false
@@ -159,7 +184,7 @@ local function start_install(package, reason)
 	package.queued = false
 	package.downloading = true
 
-	if not core.handle_async(download_package, params, callback) then
+	if not core.handle_async(download_and_extract, params, callback) then
 		core.log("error", "ERROR: async event failed")
 		gamedata.errormessage = fgettext("Failed to download $1", package.name)
 		return
@@ -184,7 +209,7 @@ local function get_raw_dependencies(package)
 	local url_fmt = "/api/packages/%s/dependencies/?only_hard=1&protocol_version=%s&engine_version=%s"
 	local version = core.get_version()
 	local base_url = core.settings:get("contentdb_url")
-	local url = base_url .. url_fmt:format(package.id, core.get_max_supp_proto(), version.string)
+	local url = base_url .. url_fmt:format(package.url_part, core.get_max_supp_proto(), urlencode(version.string))
 
 	local response = http.fetch_sync({ url = url })
 	if not response.succeeded then
@@ -559,17 +584,16 @@ function store.load()
 	local base_url = core.settings:get("contentdb_url")
 	local url = base_url ..
 		"/api/packages/?type=mod&type=game&type=txp&protocol_version=" ..
-		core.get_max_supp_proto() .. "&engine_version=" .. version.string
+		core.get_max_supp_proto() .. "&engine_version=" .. urlencode(version.string)
 
 	for _, item in pairs(core.settings:get("contentdb_flag_blacklist"):split(",")) do
 		item = item:trim()
 		if item ~= "" then
-			url = url .. "&hide=" .. item
+			url = url .. "&hide=" .. urlencode(item)
 		end
 	end
 
-	local timeout = tonumber(core.settings:get("curl_file_download_timeout"))
-	local response = http.fetch_sync({ url = url, timeout = timeout })
+	local response = http.fetch_sync({ url = url })
 	if not response.succeeded then
 		return
 	end
@@ -579,12 +603,16 @@ function store.load()
 
 	for _, package in pairs(store.packages_full) do
 		local name_len = #package.name
+		-- This must match what store.update_paths() does!
+		package.id = package.author:lower() .. "/"
 		if package.type == "game" and name_len > 5 and package.name:sub(name_len - 4) == "_game" then
-			package.id = package.author:lower() .. "/" .. package.name:sub(1, name_len - 5)
+			package.id = package.id .. package.name:sub(1, name_len - 5)
 		else
-			package.id = package.author:lower() .. "/" .. package.name
+			package.id = package.id .. package.name
 		end
 
+		package.url_part = urlencode(package.author) .. "/" .. urlencode(package.name)
+
 		if package.aliases then
 			for _, alias in ipairs(package.aliases) do
 				-- We currently don't support name changing
@@ -834,8 +862,7 @@ function store.get_formspec(dlgdata)
 			formspec[#formspec + 1] = "cdb_downloading.png;3;400;]"
 		elseif package.queued then
 			formspec[#formspec + 1] = left_base
-			formspec[#formspec + 1] = core.formspec_escape(defaulttexturedir)
-			formspec[#formspec + 1] = "cdb_queued.png;queued]"
+			formspec[#formspec + 1] = "cdb_queued.png;queued;]"
 		elseif not package.path then
 			local elem_name = "install_" .. i .. ";"
 			formspec[#formspec + 1] = "style[" .. elem_name .. "bgcolor=#71aa34]"
@@ -998,9 +1025,9 @@ function store.handle_submit(this, fields)
 		end
 
 		if fields["view_" .. i] then
-			local url = ("%s/packages/%s/%s?protocol_version=%d"):format(
-					core.settings:get("contentdb_url"),
-					package.author, package.name, core.get_max_supp_proto())
+			local url = ("%s/packages/%s?protocol_version=%d"):format(
+					core.settings:get("contentdb_url"), package.url_part,
+					core.get_max_supp_proto())
 			core.open_url(url)
 			return true
 		end
diff --git a/builtin/mainmenu/dlg_create_world.lua b/builtin/mainmenu/dlg_create_world.lua
index 1938747fe..76ceb0f16 100644
--- a/builtin/mainmenu/dlg_create_world.lua
+++ b/builtin/mainmenu/dlg_create_world.lua
@@ -15,7 +15,8 @@
 --with this program; if not, write to the Free Software Foundation, Inc.,
 --51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-local worldname = ""
+-- cf. tab_local, the gamebar already provides game selection so we hide the list from here
+local hide_gamelist = PLATFORM ~= "Android"
 
 local function table_to_flags(ftable)
 	-- Convert e.g. { jungles = true, caves = false } to "jungles,nocaves"
@@ -31,9 +32,8 @@ local function strflag(flags, flag)
 	return (flags[flag] == true) and "true" or "false"
 end
 
-local cb_caverns = { "caverns", fgettext("Caverns"), "caverns",
+local cb_caverns = { "caverns", fgettext("Caverns"),
 	fgettext("Very large caverns deep in the underground") }
-local tt_sea_rivers = fgettext("Sea level rivers")
 
 local flag_checkboxes = {
 	v5 = {
@@ -41,39 +41,38 @@ local flag_checkboxes = {
 	},
 	v7 = {
 		cb_caverns,
-		{ "ridges", fgettext("Rivers"), "ridges", tt_sea_rivers },
-		{ "mountains", fgettext("Mountains"), "mountains" },
-		{ "floatlands", fgettext("Floatlands (experimental)"), "floatlands",
+		{ "ridges", fgettext("Rivers"), fgettext("Sea level rivers") },
+		{ "mountains", fgettext("Mountains") },
+		{ "floatlands", fgettext("Floatlands (experimental)"),
 		fgettext("Floating landmasses in the sky") },
 	},
 	carpathian = {
 		cb_caverns,
-		{ "rivers", fgettext("Rivers"), "rivers", tt_sea_rivers },
+		{ "rivers", fgettext("Rivers"), fgettext("Sea level rivers") },
 	},
 	valleys = {
-		{ "altitude-chill", fgettext("Altitude chill"), "altitude_chill",
+		{ "altitude_chill", fgettext("Altitude chill"),
 		fgettext("Reduces heat with altitude") },
-		{ "altitude-dry", fgettext("Altitude dry"), "altitude_dry",
+		{ "altitude_dry", fgettext("Altitude dry"),
 		fgettext("Reduces humidity with altitude") },
-		{ "humid-rivers", fgettext("Humid rivers"), "humid_rivers",
+		{ "humid_rivers", fgettext("Humid rivers"),
 		fgettext("Increases humidity around rivers") },
-		{ "vary-river-depth", fgettext("Vary river depth"), "vary_river_depth",
+		{ "vary_river_depth", fgettext("Vary river depth"),
 		fgettext("Low humidity and high heat causes shallow or dry rivers") },
 	},
 	flat = {
 		cb_caverns,
-		{ "hills", fgettext("Hills"), "hills" },
-		{ "lakes", fgettext("Lakes"), "lakes" },
+		{ "hills", fgettext("Hills") },
+		{ "lakes", fgettext("Lakes") },
 	},
 	fractal = {
-		{ "terrain", fgettext("Additional terrain"), "terrain",
+		{ "terrain", fgettext("Additional terrain"),
 		fgettext("Generate non-fractal terrain: Oceans and underground") },
 	},
 	v6 = {
-		{ "trees", fgettext("Trees and jungle grass"), "trees" },
-		{ "flat", fgettext("Flat terrain"), "flat" },
-		{ "mudflow", fgettext("Mud flow"), "mudflow",
-		fgettext("Terrain surface erosion") },
+		{ "trees", fgettext("Trees and jungle grass") },
+		{ "flat", fgettext("Flat terrain") },
+		{ "mudflow", fgettext("Mud flow"), fgettext("Terrain surface erosion") },
 		-- Biome settings are in mgv6_biomes below
 	},
 }
@@ -105,38 +104,26 @@ local function create_world_formspec(dialogdata)
 			"button[4.75,2.5;3,0.5;world_create_cancel;" .. fgettext("Cancel") .. "]"
 	end
 
+	local current_mg = dialogdata.mg
 	local mapgens = core.get_mapgen_names()
 
-	local current_seed = core.settings:get("fixed_map_seed") or ""
-	local current_mg   = core.settings:get("mg_name")
 	local gameid = core.settings:get("menu_last_game")
 
-	local flags = {
-		main = core.settings:get_flags("mg_flags"),
-		v5 = core.settings:get_flags("mgv5_spflags"),
-		v6 = core.settings:get_flags("mgv6_spflags"),
-		v7 = core.settings:get_flags("mgv7_spflags"),
-		fractal = core.settings:get_flags("mgfractal_spflags"),
-		carpathian = core.settings:get_flags("mgcarpathian_spflags"),
-		valleys = core.settings:get_flags("mgvalleys_spflags"),
-		flat = core.settings:get_flags("mgflat_spflags"),
-	}
-
-	local gameidx = 0
-	if gameid ~= nil then
-		local _
-		_, gameidx = pkgmgr.find_by_gameid(gameid)
+	local flags = dialogdata.flags
 
-		if gameidx == nil then
-			gameidx = 0
-		end
+	local game, gameidx = pkgmgr.find_by_gameid(gameid)
+	if game == nil and hide_gamelist then
+		-- should never happen but just pick the first game
+		game = pkgmgr.get_game(1)
+		gameidx = 1
+		core.settings:set("menu_last_game", game.id)
+	elseif game == nil then
+		gameidx = 0
 	end
 
-	local game_by_gameidx = core.get_game(gameidx)
 	local disallowed_mapgen_settings = {}
-	if game_by_gameidx ~= nil then
-		local gamepath = game_by_gameidx.path
-		local gameconfig = Settings(gamepath.."/game.conf")
+	if game ~= nil then
+		local gameconfig = Settings(game.path.."/game.conf")
 
 		local allowed_mapgens = (gameconfig:get("allowed_mapgens") or ""):split()
 		for key, value in pairs(allowed_mapgens) do
@@ -156,7 +143,7 @@ local function create_world_formspec(dialogdata)
 			end
 		end
 
-		if disallowed_mapgens then
+		if #disallowed_mapgens > 0 then
 			for i = #mapgens, 1, -1 do
 				if table.indexof(disallowed_mapgens, mapgens[i]) > 0 then
 					table.remove(mapgens, i)
@@ -172,23 +159,29 @@ local function create_world_formspec(dialogdata)
 
 	local mglist = ""
 	local selindex
-	local i = 1
-	local first_mg
-	for k,v in pairs(mapgens) do
-		if not first_mg then
-			first_mg = v
+	do -- build the list of mapgens
+		local i = 1
+		local first_mg
+		for k, v in pairs(mapgens) do
+			if not first_mg then
+				first_mg = v
+			end
+			if current_mg == v then
+				selindex = i
+			end
+			i = i + 1
+			mglist = mglist .. core.formspec_escape(v) .. ","
 		end
-		if current_mg == v then
-			selindex = i
+		if not selindex then
+			selindex = 1
+			current_mg = first_mg
 		end
-		i = i + 1
-		mglist = mglist .. v .. ","
-	end
-	if not selindex then
-		selindex = 1
-		current_mg = first_mg
+		mglist = mglist:sub(1, -2)
 	end
-	mglist = mglist:sub(1, -2)
+
+	-- The logic of the flag element IDs is as follows:
+	-- "flag_main_foo-bar-baz" controls dialogdata.flags["main"]["foo_bar_baz"]
+	-- see the buttonhandler for the implementation of this
 
 	local mg_main_flags = function(mapgen, y)
 		if mapgen == "singlenode" then
@@ -198,11 +191,11 @@ local function create_world_formspec(dialogdata)
 			return "", y
 		end
 
-		local form = "checkbox[0," .. y .. ";flag_mg_caves;" ..
+		local form = "checkbox[0," .. y .. ";flag_main_caves;" ..
 			fgettext("Caves") .. ";"..strflag(flags.main, "caves").."]"
 		y = y + 0.5
 
-		form = form .. "checkbox[0,"..y..";flag_mg_dungeons;" ..
+		form = form .. "checkbox[0,"..y..";flag_main_dungeons;" ..
 			fgettext("Dungeons") .. ";"..strflag(flags.main, "dungeons").."]"
 		y = y + 0.5
 
@@ -213,7 +206,7 @@ local function create_world_formspec(dialogdata)
 		else
 			d_tt = fgettext("Structures appearing on the terrain, typically trees and plants")
 		end
-		form = form .. "checkbox[0,"..y..";flag_mg_decorations;" ..
+		form = form .. "checkbox[0,"..y..";flag_main_decorations;" ..
 			d_name .. ";" ..
 			strflag(flags.main, "decorations").."]" ..
 			"tooltip[flag_mg_decorations;" ..
@@ -221,7 +214,7 @@ local function create_world_formspec(dialogdata)
 			"]"
 		y = y + 0.5
 
-		form = form .. "tooltip[flag_mg_caves;" ..
+		form = form .. "tooltip[flag_main_caves;" ..
 		fgettext("Network of tunnels and caves")
 		.. "]"
 		return form, y
@@ -235,13 +228,13 @@ local function create_world_formspec(dialogdata)
 			return "", y
 		end
 		local form = ""
-		for _,tab in pairs(flag_checkboxes[mapgen]) do
-			local id = "flag_mg"..mapgen.."_"..tab[1]
+		for _, tab in pairs(flag_checkboxes[mapgen]) do
+			local id = "flag_"..mapgen.."_"..tab[1]:gsub("_", "-")
 			form = form .. ("checkbox[0,%f;%s;%s;%s]"):
-				format(y, id, tab[2], strflag(flags[mapgen], tab[3]))
+				format(y, id, tab[2], strflag(flags[mapgen], tab[1]))
 
-			if tab[4] then
-				form = form .. "tooltip["..id..";"..tab[4].."]"
+			if tab[3] then
+				form = form .. "tooltip["..id..";"..tab[3].."]"
 			end
 			y = y + 0.5
 		end
@@ -277,16 +270,14 @@ local function create_world_formspec(dialogdata)
 
 		-- biomeblend
 		y = y + 0.55
-		form = form .. "checkbox[0,"..y..";flag_mgv6_biomeblend;" ..
+		form = form .. "checkbox[0,"..y..";flag_v6_biomeblend;" ..
 			fgettext("Biome blending") .. ";"..strflag(flags.v6, "biomeblend").."]" ..
-			"tooltip[flag_mgv6_biomeblend;" ..
+			"tooltip[flag_v6_biomeblend;" ..
 			fgettext("Smooth transition between biomes") .. "]"
 
 		return form, y
 	end
 
-	current_seed = core.formspec_escape(current_seed)
-
 	local y_start = 0.0
 	local y = y_start
 	local str_flags, str_spflags
@@ -323,21 +314,32 @@ local function create_world_formspec(dialogdata)
 		"container[0,0]"..
 		"field[0.3,0.6;6,0.5;te_world_name;" ..
 		fgettext("World name") ..
-		";" .. core.formspec_escape(worldname) .. "]" ..
+		";" .. core.formspec_escape(dialogdata.worldname) .. "]" ..
+		"set_focus[te_world_name;false]"
+
+	if not disallowed_mapgen_settings["seed"] then
 
-		"field[0.3,1.7;6,0.5;te_seed;" ..
-		fgettext("Seed") ..
-		";".. current_seed .. "]" ..
+		retval = retval .. "field[0.3,1.7;6,0.5;te_seed;" ..
+				fgettext("Seed") ..
+				";".. core.formspec_escape(dialogdata.seed) .. "]"
+
+	end
 
+	retval = retval ..
 		"label[0,2;" .. fgettext("Mapgen") .. "]"..
-		"dropdown[0,2.5;6.3;dd_mapgen;" .. mglist .. ";" .. selindex .. "]" ..
+		"dropdown[0,2.5;6.3;dd_mapgen;" .. mglist .. ";" .. selindex .. "]"
+
+	if not hide_gamelist or devtest_only ~= "" then
+		retval = retval ..
+			"label[0,3.35;" .. fgettext("Game") .. "]"..
+			"textlist[0,3.85;5.8,"..gamelist_height..";games;" ..
+			pkgmgr.gamelist() .. ";" .. gameidx .. ";false]" ..
+			"container[0,4.5]" ..
+			devtest_only ..
+			"container_end[]"
+	end
 
-		"label[0,3.35;" .. fgettext("Game") .. "]"..
-		"textlist[0,3.85;5.8,"..gamelist_height..";games;" ..
-		pkgmgr.gamelist() .. ";" .. gameidx .. ";false]" ..
-		"container[0,4.5]" ..
-		devtest_only ..
-		"container_end[]" ..
+	retval = retval ..
 		"container_end[]" ..
 
 		-- Right side
@@ -360,9 +362,20 @@ local function create_world_buttonhandler(this, fields)
 		fields["key_enter"] then
 
 		local worldname = fields["te_world_name"]
-		local gameindex = core.get_textlist_index("games")
+		local game, gameindex
+		if hide_gamelist then
+			game, gameindex = pkgmgr.find_by_gameid(core.settings:get("menu_last_game"))
+		else
+			gameindex = core.get_textlist_index("games")
+			game = pkgmgr.get_game(gameindex)
+		end
+
+		local message
+		if game == nil then
+			message = fgettext("No game selected")
+		end
 
-		if gameindex ~= nil then
+		if message == nil then
 			-- For unnamed worlds use the generated name 'world<number>',
 			-- where the number increments: it is set to 1 larger than the largest
 			-- generated name number found.
@@ -377,36 +390,48 @@ local function create_world_buttonhandler(this, fields)
 				worldname = "world" .. worldnum_max + 1
 			end
 
-			core.settings:set("fixed_map_seed", fields["te_seed"])
-
-			local message
-			if not menudata.worldlist:uid_exists_raw(worldname) then
-				core.settings:set("mg_name",fields["dd_mapgen"])
-				message = core.create_world(worldname,gameindex)
-			else
+			if menudata.worldlist:uid_exists_raw(worldname) then
 				message = fgettext("A world named \"$1\" already exists", worldname)
 			end
+		end
 
-			if message ~= nil then
-				gamedata.errormessage = message
-			else
-				core.settings:set("menu_last_game",pkgmgr.games[gameindex].id)
-				if this.data.update_worldlist_filter then
-					menudata.worldlist:set_filtercriteria(pkgmgr.games[gameindex].id)
-					mm_texture.update("singleplayer", pkgmgr.games[gameindex].id)
-				end
-				menudata.worldlist:refresh()
-				core.settings:set("mainmenu_last_selected_world",
-									menudata.worldlist:raw_index_by_uid(worldname))
+		if message == nil then
+			this.data.seed = fields["te_seed"] or ""
+			this.data.mg = fields["dd_mapgen"]
+
+			-- actual names as used by engine
+			local settings = {
+				fixed_map_seed = this.data.seed,
+				mg_name = this.data.mg,
+				mg_flags = table_to_flags(this.data.flags.main),
+				mgv5_spflags = table_to_flags(this.data.flags.v5),
+				mgv6_spflags = table_to_flags(this.data.flags.v6),
+				mgv7_spflags = table_to_flags(this.data.flags.v7),
+				mgfractal_spflags = table_to_flags(this.data.flags.fractal),
+				mgcarpathian_spflags = table_to_flags(this.data.flags.carpathian),
+				mgvalleys_spflags = table_to_flags(this.data.flags.valleys),
+				mgflat_spflags = table_to_flags(this.data.flags.flat),
+			}
+			message = core.create_world(worldname, gameindex, settings)
+		end
+
+		if message == nil then
+			core.settings:set("menu_last_game", game.id)
+			if this.data.update_worldlist_filter then
+				menudata.worldlist:set_filtercriteria(game.id)
 			end
-		else
-			gamedata.errormessage = fgettext("No game selected")
+			menudata.worldlist:refresh()
+			core.settings:set("mainmenu_last_selected_world",
+					menudata.worldlist:raw_index_by_uid(worldname))
 		end
+
+		gamedata.errormessage = message
 		this:delete()
 		return true
 	end
 
-	worldname = fields.te_world_name
+	this.data.worldname = fields["te_world_name"]
+	this.data.seed = fields["te_seed"] or ""
 
 	if fields["games"] then
 		local gameindex = core.get_textlist_index("games")
@@ -417,22 +442,11 @@ local function create_world_buttonhandler(this, fields)
 	for k,v in pairs(fields) do
 		local split = string.split(k, "_", nil, 3)
 		if split and split[1] == "flag" then
-			local setting
-			if split[2] == "mg" then
-				setting = "mg_flags"
-			else
-				setting = split[2].."_spflags"
-			end
 			-- We replaced the underscore of flag names with a dash.
 			local flag = string.gsub(split[3], "-", "_")
-			local ftable = core.settings:get_flags(setting)
-			if v == "true" then
-				ftable[flag] = true
-			else
-				ftable[flag] = false
-			end
-			local flags = table_to_flags(ftable)
-			core.settings:set(setting, flags)
+			local ftable = this.data.flags[split[2]]
+			assert(ftable)
+			ftable[flag] = v == "true"
 			return true
 		end
 	end
@@ -446,18 +460,16 @@ local function create_world_buttonhandler(this, fields)
 		local entry = core.formspec_escape(fields["mgv6_biomes"])
 		for b=1, #mgv6_biomes do
 			if entry == mgv6_biomes[b][1] then
-				local ftable = core.settings:get_flags("mgv6_spflags")
+				local ftable = this.data.flags.v6
 				ftable.jungles = mgv6_biomes[b][2].jungles
 				ftable.snowbiomes = mgv6_biomes[b][2].snowbiomes
-				local flags = table_to_flags(ftable)
-				core.settings:set("mgv6_spflags", flags)
 				return true
 			end
 		end
 	end
 
 	if fields["dd_mapgen"] then
-		core.settings:set("mg_name", fields["dd_mapgen"])
+		this.data.mg = fields["dd_mapgen"]
 		return true
 	end
 
@@ -466,12 +478,27 @@ end
 
 
 function create_create_world_dlg(update_worldlistfilter)
-	worldname = ""
 	local retval = dialog_create("sp_create_world",
 					create_world_formspec,
 					create_world_buttonhandler,
 					nil)
-	retval.update_worldlist_filter = update_worldlistfilter
+	retval.data = {
+		update_worldlist_filter = update_worldlistfilter,
+		worldname = "",
+		-- settings the world is created with:
+		seed = core.settings:get("fixed_map_seed") or "",
+		mg = core.settings:get("mg_name"),
+		flags = {
+			main = core.settings:get_flags("mg_flags"),
+			v5 = core.settings:get_flags("mgv5_spflags"),
+			v6 = core.settings:get_flags("mgv6_spflags"),
+			v7 = core.settings:get_flags("mgv7_spflags"),
+			fractal = core.settings:get_flags("mgfractal_spflags"),
+			carpathian = core.settings:get_flags("mgcarpathian_spflags"),
+			valleys = core.settings:get_flags("mgvalleys_spflags"),
+			flat = core.settings:get_flags("mgflat_spflags"),
+		}
+	}
 
 	return retval
 end
diff --git a/builtin/mainmenu/dlg_settings_advanced.lua b/builtin/mainmenu/dlg_settings_advanced.lua
index 38a658969..d6f485cf7 100644
--- a/builtin/mainmenu/dlg_settings_advanced.lua
+++ b/builtin/mainmenu/dlg_settings_advanced.lua
@@ -378,7 +378,7 @@ local function parse_config_file(read_all, parse_mods)
 		-- Parse mods
 		local mods_category_initialized = false
 		local mods = {}
-		get_mods(core.get_modpath(), mods)
+		get_mods(core.get_modpath(), "mods", mods)
 		for _, mod in ipairs(mods) do
 			local path = mod.path .. DIR_DELIM .. FILENAME
 			local file = io.open(path, "r")
@@ -395,6 +395,7 @@ local function parse_config_file(read_all, parse_mods)
 
 				table.insert(settings, {
 					name = mod.name,
+					readable_name = mod.title,
 					level = 1,
 					type = "category",
 				})
@@ -408,7 +409,7 @@ local function parse_config_file(read_all, parse_mods)
 		-- Parse clientmods
 		local clientmods_category_initialized = false
 		local clientmods = {}
-		get_mods(core.get_clientmodpath(), clientmods)
+		get_mods(core.get_clientmodpath(), "clientmods", clientmods)
 		for _, clientmod in ipairs(clientmods) do
 			local path = clientmod.path .. DIR_DELIM .. FILENAME
 			local file = io.open(path, "r")
@@ -527,44 +528,40 @@ end
 
 local function get_current_np_group(setting)
 	local value = core.settings:get_np_group(setting.name)
-	local t = {}
 	if value == nil then
-		t = setting.values
-	else
-		table.insert(t, value.offset)
-		table.insert(t, value.scale)
-		table.insert(t, value.spread.x)
-		table.insert(t, value.spread.y)
-		table.insert(t, value.spread.z)
-		table.insert(t, value.seed)
-		table.insert(t, value.octaves)
-		table.insert(t, value.persistence)
-		table.insert(t, value.lacunarity)
-		table.insert(t, value.flags)
+		return setting.values
 	end
-	return t
+	local p = "%g"
+	return {
+		p:format(value.offset),
+		p:format(value.scale),
+		p:format(value.spread.x),
+		p:format(value.spread.y),
+		p:format(value.spread.z),
+		p:format(value.seed),
+		p:format(value.octaves),
+		p:format(value.persistence),
+		p:format(value.lacunarity),
+		value.flags
+	}
 end
 
 local function get_current_np_group_as_string(setting)
 	local value = core.settings:get_np_group(setting.name)
-	local t
 	if value == nil then
-		t = setting.default
-	else
-		t = value.offset .. ", " ..
-			value.scale .. ", (" ..
-			value.spread.x .. ", " ..
-			value.spread.y .. ", " ..
-			value.spread.z .. "), " ..
-			value.seed .. ", " ..
-			value.octaves .. ", " ..
-			value.persistence .. ", " ..
-			value.lacunarity
-		if value.flags ~= "" then
-			t = t .. ", " .. value.flags
-		end
+		return setting.default
 	end
-	return t
+	return ("%g, %g, (%g, %g, %g), %g, %g, %g, %g"):format(
+		value.offset,
+		value.scale,
+		value.spread.x,
+		value.spread.y,
+		value.spread.z,
+		value.seed,
+		value.octaves,
+		value.persistence,
+		value.lacunarity
+	) .. (value.flags ~= "" and (", " .. value.flags) or "")
 end
 
 local checkboxes = {} -- handle checkboxes events
@@ -697,7 +694,7 @@ local function create_change_setting_formspec(dialogdata)
 	elseif setting.type == "v3f" then
 		local val = get_current_value(setting)
 		local v3f = {}
-		for line in val:gmatch("[+-]?[%d.-e]+") do -- All numeric characters
+		for line in val:gmatch("[+-]?[%d.+-eE]+") do -- All numeric characters
 			table.insert(v3f, line)
 		end
 
@@ -990,7 +987,7 @@ local function create_settings_formspec(tabview, _, tabdata)
 	local current_level = 0
 	for _, entry in ipairs(settings) do
 		local name
-		if not core.settings:get_bool("main_menu_technical_settings") and entry.readable_name then
+		if not core.settings:get_bool("show_technical_names") and entry.readable_name then
 			name = fgettext_ne(entry.readable_name)
 		else
 			name = entry.name
@@ -1031,7 +1028,7 @@ local function create_settings_formspec(tabview, _, tabdata)
 			"button[10,4.9;2,1;btn_edit;" .. fgettext("Edit") .. "]" ..
 			"button[7,4.9;3,1;btn_restore;" .. fgettext("Restore Default") .. "]" ..
 			"checkbox[0,4.3;cb_tech_settings;" .. fgettext("Show technical names") .. ";"
-					.. dump(core.settings:get_bool("main_menu_technical_settings")) .. "]"
+					.. dump(core.settings:get_bool("show_technical_names")) .. "]"
 
 	return formspec
 end
@@ -1114,7 +1111,7 @@ local function handle_settings_buttons(this, fields, tabname, tabdata)
 	end
 
 	if fields["cb_tech_settings"] then
-		core.settings:set("main_menu_technical_settings", fields["cb_tech_settings"])
+		core.settings:set("show_technical_names", fields["cb_tech_settings"])
 		core.settings:write()
 		core.update_formspec(this:get_formspec())
 		return true
diff --git a/builtin/mainmenu/textures.lua b/builtin/mainmenu/game_theme.lua
index a3acbbdec..89e1b66c8 100644
--- a/builtin/mainmenu/textures.lua
+++ b/builtin/mainmenu/game_theme.lua
@@ -16,23 +16,25 @@
 --51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 
-mm_texture = {}
+mm_game_theme = {}
 
 --------------------------------------------------------------------------------
-function mm_texture.init()
-	mm_texture.defaulttexturedir = core.get_texturepath() .. DIR_DELIM .. "base" ..
+function mm_game_theme.init()
+	mm_game_theme.defaulttexturedir = core.get_texturepath_share() .. DIR_DELIM .. "base" ..
 						DIR_DELIM .. "pack" .. DIR_DELIM
-	mm_texture.basetexturedir = mm_texture.defaulttexturedir
+	mm_game_theme.basetexturedir = mm_game_theme.defaulttexturedir
 
-	mm_texture.texturepack = core.settings:get("texture_path")
+	mm_game_theme.texturepack = core.settings:get("texture_path")
 
-	mm_texture.gameid = nil
+	mm_game_theme.gameid = nil
+
+	mm_game_theme.music_handle = nil
 end
 
 --------------------------------------------------------------------------------
-function mm_texture.update(tab,gamedetails)
+function mm_game_theme.update(tab,gamedetails)
 	if tab ~= "singleplayer" then
-		mm_texture.reset()
+		mm_game_theme.reset()
 		return
 	end
 
@@ -40,50 +42,54 @@ function mm_texture.update(tab,gamedetails)
 		return
 	end
 
-	mm_texture.update_game(gamedetails)
+	mm_game_theme.update_game(gamedetails)
 end
 
 --------------------------------------------------------------------------------
-function mm_texture.reset()
-	mm_texture.gameid = nil
+function mm_game_theme.reset()
+	mm_game_theme.gameid = nil
 	local have_bg      = false
-	local have_overlay = mm_texture.set_generic("overlay")
+	local have_overlay = mm_game_theme.set_generic("overlay")
 
 	if not have_overlay then
-		have_bg = mm_texture.set_generic("background")
+		have_bg = mm_game_theme.set_generic("background")
 	end
 
-	mm_texture.clear("header")
-	mm_texture.clear("footer")
+	mm_game_theme.clear("header")
+	mm_game_theme.clear("footer")
 	core.set_clouds(false)
 
-	mm_texture.set_generic("footer")
-	mm_texture.set_generic("header")
+	mm_game_theme.set_generic("footer")
+	mm_game_theme.set_generic("header")
 
 	if not have_bg then
 		if core.settings:get_bool("menu_clouds") then
 			core.set_clouds(true)
 		else
-			mm_texture.set_dirt_bg()
+			mm_game_theme.set_dirt_bg()
 		end
 	end
+
+	if mm_game_theme.music_handle ~= nil then
+		core.sound_stop(mm_game_theme.music_handle)
+	end
 end
 
 --------------------------------------------------------------------------------
-function mm_texture.update_game(gamedetails)
-	if mm_texture.gameid == gamedetails.id then
+function mm_game_theme.update_game(gamedetails)
+	if mm_game_theme.gameid == gamedetails.id then
 		return
 	end
 
 	local have_bg      = false
-	local have_overlay = mm_texture.set_game("overlay",gamedetails)
+	local have_overlay = mm_game_theme.set_game("overlay",gamedetails)
 
 	if not have_overlay then
-		have_bg = mm_texture.set_game("background",gamedetails)
+		have_bg = mm_game_theme.set_game("background",gamedetails)
 	end
 
-	mm_texture.clear("header")
-	mm_texture.clear("footer")
+	mm_game_theme.clear("header")
+	mm_game_theme.clear("footer")
 	core.set_clouds(false)
 
 	if not have_bg then
@@ -91,34 +97,34 @@ function mm_texture.update_game(gamedetails)
 		if core.settings:get_bool("menu_clouds") then
 			core.set_clouds(true)
 		else
-			mm_texture.set_dirt_bg()
+			mm_game_theme.set_dirt_bg()
 		end
 	end
 
-	mm_texture.set_game("footer",gamedetails)
-	mm_texture.set_game("header",gamedetails)
+	mm_game_theme.set_game("footer",gamedetails)
+	mm_game_theme.set_game("header",gamedetails)
 
-	mm_texture.gameid = gamedetails.id
+	mm_game_theme.gameid = gamedetails.id
 end
 
 --------------------------------------------------------------------------------
-function mm_texture.clear(identifier)
+function mm_game_theme.clear(identifier)
 	core.set_background(identifier,"")
 end
 
 --------------------------------------------------------------------------------
-function mm_texture.set_generic(identifier)
+function mm_game_theme.set_generic(identifier)
 	--try texture pack first
-	if mm_texture.texturepack ~= nil then
-		local path = mm_texture.texturepack .. DIR_DELIM .."menu_" ..
+	if mm_game_theme.texturepack ~= nil then
+		local path = mm_game_theme.texturepack .. DIR_DELIM .."menu_" ..
 										identifier .. ".png"
 		if core.set_background(identifier,path) then
 			return true
 		end
 	end
 
-	if mm_texture.defaulttexturedir ~= nil then
-		local path = mm_texture.defaulttexturedir .. DIR_DELIM .."menu_" ..
+	if mm_game_theme.defaulttexturedir ~= nil then
+		local path = mm_game_theme.defaulttexturedir .. DIR_DELIM .."menu_" ..
 										identifier .. ".png"
 		if core.set_background(identifier,path) then
 			return true
@@ -129,14 +135,16 @@ function mm_texture.set_generic(identifier)
 end
 
 --------------------------------------------------------------------------------
-function mm_texture.set_game(identifier, gamedetails)
+function mm_game_theme.set_game(identifier, gamedetails)
 
 	if gamedetails == nil then
 		return false
 	end
 
-	if mm_texture.texturepack ~= nil then
-		local path = mm_texture.texturepack .. DIR_DELIM ..
+	mm_game_theme.set_music(gamedetails)
+
+	if mm_game_theme.texturepack ~= nil then
+		local path = mm_game_theme.texturepack .. DIR_DELIM ..
 			gamedetails.id .. "_menu_" .. identifier .. ".png"
 		if core.set_background(identifier, path) then
 			return true
@@ -171,9 +179,10 @@ function mm_texture.set_game(identifier, gamedetails)
 	return false
 end
 
-function mm_texture.set_dirt_bg()
-	if mm_texture.texturepack ~= nil then
-		local path = mm_texture.texturepack .. DIR_DELIM .."default_dirt.png"
+--------------------------------------------------------------------------------
+function mm_game_theme.set_dirt_bg()
+	if mm_game_theme.texturepack ~= nil then
+		local path = mm_game_theme.texturepack .. DIR_DELIM .."default_dirt.png"
 		if core.set_background("background", path, true, 128) then
 			return true
 		end
@@ -183,3 +192,12 @@ function mm_texture.set_dirt_bg()
 	local minimalpath = defaulttexturedir .. "menu_bg.png"
 	core.set_background("background", minimalpath, true, 128)
 end
+
+--------------------------------------------------------------------------------
+function mm_game_theme.set_music(gamedetails)
+	if mm_game_theme.music_handle ~= nil then
+		core.sound_stop(mm_game_theme.music_handle)
+	end
+	local music_path = gamedetails.path .. DIR_DELIM .. "menu" .. DIR_DELIM .. "theme"
+	mm_game_theme.music_handle = core.sound_play(music_path, true)
+end
diff --git a/builtin/mainmenu/generate_from_settingtypes.lua b/builtin/mainmenu/generate_from_settingtypes.lua
index 43fc57bb9..0f551fbb1 100644
--- a/builtin/mainmenu/generate_from_settingtypes.lua
+++ b/builtin/mainmenu/generate_from_settingtypes.lua
@@ -31,7 +31,7 @@ local group_format_template = [[
 #    octaves     = %s,
 #    persistence = %s,
 #    lacunarity  = %s,
-#    flags       = %s
+#    flags       =%s
 # }
 
 ]]
@@ -55,7 +55,11 @@ local function create_minetest_conf_example()
 			end
 			if entry.comment ~= "" then
 				for _, comment_line in ipairs(entry.comment:split("\n", true)) do
-					insert(result, "#    " .. comment_line .. "\n")
+					if comment_line == "" then
+						insert(result, "#\n")
+					else
+						insert(result, "#    " .. comment_line .. "\n")
+					end
 				end
 			end
 			insert(result, "#    type: " .. entry.type)
@@ -73,10 +77,14 @@ local function create_minetest_conf_example()
 			end
 			insert(result, "\n")
 			if group_format == true then
+				local flags = entry.values[10]
+				if flags ~= "" then
+					flags = " "..flags
+				end
 				insert(result, sprintf(group_format_template, entry.name, entry.values[1],
 						entry.values[2], entry.values[3], entry.values[4], entry.values[5],
 						entry.values[6], entry.values[7], entry.values[8], entry.values[9],
-						entry.values[10]))
+						flags))
 			else
 				local append
 				if entry.default ~= "" then
@@ -91,7 +99,7 @@ end
 
 local translation_file_header = [[
 // This file is automatically generated
-// It conatins a bunch of fake gettext calls, to tell xgettext about the strings in config files
+// It contains a bunch of fake gettext calls, to tell xgettext about the strings in config files
 // To update it, refer to the bottom of builtin/mainmenu/dlg_settings_advanced.lua
 
 fake_function() {]]
@@ -126,4 +134,3 @@ file = assert(io.open("src/settings_translation_file.cpp", "w"))
 --file = assert(io.open("settings_translation_file.cpp", "w"))
 file:write(create_translation_file())
 file:close()
-
diff --git a/builtin/mainmenu/init.lua b/builtin/mainmenu/init.lua
index 2481078e2..943454677 100644
--- a/builtin/mainmenu/init.lua
+++ b/builtin/mainmenu/init.lua
@@ -35,7 +35,7 @@ dofile(menupath .. DIR_DELIM .. "async_event.lua")
 dofile(menupath .. DIR_DELIM .. "common.lua")
 dofile(menupath .. DIR_DELIM .. "pkgmgr.lua")
 dofile(menupath .. DIR_DELIM .. "serverlistmgr.lua")
-dofile(menupath .. DIR_DELIM .. "textures.lua")
+dofile(menupath .. DIR_DELIM .. "game_theme.lua")
 
 dofile(menupath .. DIR_DELIM .. "dlg_config_world.lua")
 dofile(menupath .. DIR_DELIM .. "dlg_settings_advanced.lua")
@@ -87,7 +87,7 @@ local function init_globals()
 		core.settings:set("menu_last_game", default_game)
 	end
 
-	mm_texture.init()
+	mm_game_theme.init()
 
 	-- Create main tabview
 	local tv_main = tabview_create("maintab", {x = 12, y = 5.4}, {x = 0, y = 0})
@@ -113,7 +113,7 @@ local function init_globals()
 	if tv_main.current_tab == "local" then
 		local game = pkgmgr.find_by_gameid(core.settings:get("menu_last_game"))
 		if game == nil then
-			mm_texture.reset()
+			mm_game_theme.reset()
 		end
 	end
 
@@ -121,8 +121,6 @@ local function init_globals()
 	tv_main:show()
 
 	ui.update()
-
-	core.sound_play("main_menu", true)
 end
 
 init_globals()
diff --git a/builtin/mainmenu/pkgmgr.lua b/builtin/mainmenu/pkgmgr.lua
index 58a4ed8c1..072c41f0c 100644
--- a/builtin/mainmenu/pkgmgr.lua
+++ b/builtin/mainmenu/pkgmgr.lua
@@ -78,34 +78,35 @@ local function load_texture_packs(txtpath, retval)
 
 	for _, item in ipairs(list) do
 		if item ~= "base" then
-			local name = item
-
 			local path = txtpath .. DIR_DELIM .. item .. DIR_DELIM
-			if path == current_texture_path then
-				name = fgettext("$1 (Enabled)", name)
-			end
-
 			local conf = Settings(path .. "texture_pack.conf")
+			local enabled = path == current_texture_path
+
+			local title = conf:get("title") or item
 
+			-- list_* is only used if non-nil, else the regular versions are used.
 			retval[#retval + 1] = {
 				name = item,
+				title = title,
+				list_name = enabled and fgettext("$1 (Enabled)", item) or nil,
+				list_title = enabled and fgettext("$1 (Enabled)", title) or nil,
 				author = conf:get("author"),
 				release = tonumber(conf:get("release")) or 0,
-				list_name = name,
 				type = "txp",
 				path = path,
-				enabled = path == current_texture_path,
+				enabled = enabled,
 			}
 		end
 	end
 end
 
-function get_mods(path,retval,modpack)
+function get_mods(path, virtual_path, retval, modpack)
 	local mods = core.get_dir_list(path, true)
 
 	for _, name in ipairs(mods) do
 		if name:sub(1, 1) ~= "." then
-			local prefix = path .. DIR_DELIM .. name
+			local mod_path = path .. DIR_DELIM .. name
+			local mod_virtual_path = virtual_path .. "/" .. name
 			local toadd = {
 				dir_name = name,
 				parent_dir = path,
@@ -114,18 +115,18 @@ function get_mods(path,retval,modpack)
 
 			-- Get config file
 			local mod_conf
-			local modpack_conf = io.open(prefix .. DIR_DELIM .. "modpack.conf")
+			local modpack_conf = io.open(mod_path .. DIR_DELIM .. "modpack.conf")
 			if modpack_conf then
 				toadd.is_modpack = true
 				modpack_conf:close()
 
-				mod_conf = Settings(prefix .. DIR_DELIM .. "modpack.conf"):to_table()
+				mod_conf = Settings(mod_path .. DIR_DELIM .. "modpack.conf"):to_table()
 				if mod_conf.name then
 					name = mod_conf.name
 					toadd.is_name_explicit = true
 				end
 			else
-				mod_conf = Settings(prefix .. DIR_DELIM .. "mod.conf"):to_table()
+				mod_conf = Settings(mod_path .. DIR_DELIM .. "mod.conf"):to_table()
 				if mod_conf.name then
 					name = mod_conf.name
 					toadd.is_name_explicit = true
@@ -134,14 +135,16 @@ function get_mods(path,retval,modpack)
 
 			-- Read from config
 			toadd.name = name
+			toadd.title = mod_conf.title
 			toadd.author = mod_conf.author
 			toadd.release = tonumber(mod_conf.release) or 0
-			toadd.path = prefix
+			toadd.path = mod_path
+			toadd.virtual_path = mod_virtual_path
 			toadd.type = "mod"
 
 			-- Check modpack.txt
 			-- Note: modpack.conf is already checked above
-			local modpackfile = io.open(prefix .. DIR_DELIM .. "modpack.txt")
+			local modpackfile = io.open(mod_path .. DIR_DELIM .. "modpack.txt")
 			if modpackfile then
 				modpackfile:close()
 				toadd.is_modpack = true
@@ -153,7 +156,7 @@ function get_mods(path,retval,modpack)
 			elseif toadd.is_modpack then
 				toadd.type = "modpack"
 				toadd.is_modpack = true
-				get_mods(prefix, retval, name)
+				get_mods(mod_path, mod_virtual_path, retval, name)
 			end
 		end
 	end
@@ -181,21 +184,6 @@ function pkgmgr.get_texture_packs()
 end
 
 --------------------------------------------------------------------------------
-function pkgmgr.extract(modfile)
-	if modfile.type == "zip" then
-		local tempfolder = os.tempfolder()
-
-		if tempfolder ~= nil and
-			tempfolder ~= "" then
-			core.create_dir(tempfolder)
-			if core.extract_zip(modfile.name,tempfolder) then
-				return tempfolder
-			end
-		end
-	end
-	return nil
-end
-
 function pkgmgr.get_folder_type(path)
 	local testfile = io.open(path .. DIR_DELIM .. "init.lua","r")
 	if testfile ~= nil then
@@ -349,7 +337,7 @@ function pkgmgr.identify_modname(modpath,filename)
 	return nil
 end
 --------------------------------------------------------------------------------
-function pkgmgr.render_packagelist(render_list)
+function pkgmgr.render_packagelist(render_list, use_technical_names)
 	if not render_list then
 		if not pkgmgr.global_mods then
 			pkgmgr.refresh_globals()
@@ -385,7 +373,12 @@ function pkgmgr.render_packagelist(render_list)
 		else
 			retval[#retval + 1] = "0"
 		end
-		retval[#retval + 1] = core.formspec_escape(v.list_name or v.name)
+
+		if use_technical_names then
+			retval[#retval + 1] = core.formspec_escape(v.list_name or v.name)
+		else
+			retval[#retval + 1] = core.formspec_escape(v.list_title or v.list_name or v.title or v.name)
+		end
 	end
 
 	return table.concat(retval, ",")
@@ -412,6 +405,14 @@ function pkgmgr.is_modpack_entirely_enabled(data, name)
 	return true
 end
 
+local function disable_all_by_name(list, name, except)
+	for i=1, #list do
+		if list[i].name == name and list[i] ~= except then
+			list[i].enabled = false
+		end
+	end
+end
+
 ---------- toggles or en/disables a mod or modpack and its dependencies --------
 local function toggle_mod_or_modpack(list, toggled_mods, enabled_mods, toset, mod)
 	if not mod.is_modpack then
@@ -420,13 +421,16 @@ local function toggle_mod_or_modpack(list, toggled_mods, enabled_mods, toset, mo
 			toset = not mod.enabled
 		end
 		if mod.enabled ~= toset then
-			mod.enabled = toset
 			toggled_mods[#toggled_mods+1] = mod.name
 		end
 		if toset then
 			-- Mark this mod for recursive dependency traversal
 			enabled_mods[mod.name] = true
+
+			-- Disable other mods with the same name
+			disable_all_by_name(list, mod.name, mod)
 		end
+		mod.enabled = toset
 	else
 		-- Toggle or en/disable every mod in the modpack,
 		-- interleaved unsupported
@@ -451,7 +455,7 @@ function pkgmgr.enable_mod(this, toset)
 	local enabled_mods = {}
 	toggle_mod_or_modpack(list, toggled_mods, enabled_mods, toset, mod)
 
-	if not toset then
+	if next(enabled_mods) == nil then
 		-- Mod(s) were disabled, so no dependencies need to be enabled
 		table.sort(toggled_mods)
 		core.log("info", "Following mods were disabled: " ..
@@ -461,11 +465,16 @@ function pkgmgr.enable_mod(this, toset)
 
 	-- Enable mods' depends after activation
 
-	-- Make a list of mod ids indexed by their names
+	-- Make a list of mod ids indexed by their names. Among mods with the
+	-- same name, enabled mods take precedence, after which game mods take
+	-- precedence, being last in the mod list.
 	local mod_ids = {}
 	for id, mod2 in pairs(list) do
 		if mod2.type == "mod" and not mod2.is_modpack then
-			mod_ids[mod2.name] = id
+			local prev_id = mod_ids[mod2.name]
+			if not prev_id or not list[prev_id].enabled then
+				mod_ids[mod2.name] = id
+			end
 		end
 	end
 
@@ -482,6 +491,7 @@ function pkgmgr.enable_mod(this, toset)
 			end
 		end
 	end
+
 	-- If sp is 0, every dependency is already activated
 	while sp > 0 do
 		local name = to_enable[sp]
@@ -494,14 +504,14 @@ function pkgmgr.enable_mod(this, toset)
 				core.log("warning", "Mod dependency \"" .. name ..
 					"\" not found!")
 			else
-				if mod_to_enable.enabled == false then
+				if not mod_to_enable.enabled then
 					mod_to_enable.enabled = true
 					toggled_mods[#toggled_mods+1] = mod_to_enable.name
 				end
 				-- Push the dependencies of the dependency onto the stack
 				local depends = pkgmgr.get_dependencies(mod_to_enable.path)
 				for i = 1, #depends do
-					if not enabled_mods[name] then
+					if not enabled_mods[depends[i]] then
 						sp = sp+1
 						to_enable[sp] = depends[i]
 					end
@@ -561,11 +571,10 @@ function pkgmgr.install_dir(type, path, basename, targetpath)
 		local from = basefolder and basefolder.path or path
 		if targetpath then
 			core.delete_dir(targetpath)
-			core.create_dir(targetpath)
 		else
 			targetpath = core.get_texturepath() .. DIR_DELIM .. basename
 		end
-		if not core.copy_dir(from, targetpath) then
+		if not core.copy_dir(from, targetpath, false) then
 			return nil,
 				fgettext("Failed to install $1 to $2", basename, targetpath)
 		end
@@ -586,7 +595,6 @@ function pkgmgr.install_dir(type, path, basename, targetpath)
 		-- Get destination name for modpack
 		if targetpath then
 			core.delete_dir(targetpath)
-			core.create_dir(targetpath)
 		else
 			local clean_path = nil
 			if basename ~= nil then
@@ -610,7 +618,6 @@ function pkgmgr.install_dir(type, path, basename, targetpath)
 
 		if targetpath then
 			core.delete_dir(targetpath)
-			core.create_dir(targetpath)
 		else
 			local targetfolder = basename
 			if targetfolder == nil then
@@ -636,14 +643,13 @@ function pkgmgr.install_dir(type, path, basename, targetpath)
 
 		if targetpath then
 			core.delete_dir(targetpath)
-			core.create_dir(targetpath)
 		else
 			targetpath = core.get_gamepath() .. DIR_DELIM .. basename
 		end
 	end
 
 	-- Copy it
-	if not core.copy_dir(basefolder.path, targetpath) then
+	if not core.copy_dir(basefolder.path, targetpath, false) then
 		return nil,
 			fgettext("Failed to install $1 to $2", basename, targetpath)
 	end
@@ -658,23 +664,6 @@ function pkgmgr.install_dir(type, path, basename, targetpath)
 end
 
 --------------------------------------------------------------------------------
-function pkgmgr.install(type, modfilename, basename, dest)
-	local archive_info = pkgmgr.identify_filetype(modfilename)
-	local path = pkgmgr.extract(archive_info)
-
-	if path == nil then
-		return nil,
-			fgettext("Install: file: \"$1\"", archive_info.name) .. "\n" ..
-			fgettext("Install: Unsupported file type \"$1\" or broken archive",
-				archive_info.type)
-	end
-
-	local targetpath, msg = pkgmgr.install_dir(type, path, basename, dest)
-	core.delete_dir(path)
-	return targetpath, msg
-end
-
---------------------------------------------------------------------------------
 function pkgmgr.prepareclientmodlist(data)
 	local retval = {}
 
@@ -683,9 +672,8 @@ function pkgmgr.prepareclientmodlist(data)
 	--read clientmods
 	local modpath = core.get_clientmodpath()
 
-	if modpath ~= nil and
-		modpath ~= "" then
-		get_mods(modpath,clientmods)
+	if modpath ~= nil and modpath ~= "" then
+		get_mods(modpath, "clientmods", clientmods)
 	end
 
 	for i=1,#clientmods,1 do
@@ -730,16 +718,15 @@ function pkgmgr.preparemodlist(data)
 	local game_mods = {}
 
 	--read global mods
-	local modpath = core.get_modpath()
-
-	if modpath ~= nil and
-		modpath ~= "" then
-		get_mods(modpath,global_mods)
+	local modpaths = core.get_modpaths()
+	for key, modpath in pairs(modpaths) do
+		get_mods(modpath, key, global_mods)
 	end
 
 	for i=1,#global_mods,1 do
 		global_mods[i].type = "mod"
 		global_mods[i].loc = "global"
+		global_mods[i].enabled = false
 		retval[#retval + 1] = global_mods[i]
 	end
 
@@ -773,22 +760,37 @@ function pkgmgr.preparemodlist(data)
 				DIR_DELIM .. "world.mt"
 
 	local worldfile = Settings(filename)
-
-	for key,value in pairs(worldfile:to_table()) do
+	for key, value in pairs(worldfile:to_table()) do
 		if key:sub(1, 9) == "load_mod_" then
 			key = key:sub(10)
-			local element = nil
-			for i=1,#retval,1 do
+			local mod_found = false
+
+			local fallback_found = false
+			local fallback_mod = nil
+
+			for i=1, #retval do
 				if retval[i].name == key and
-					not retval[i].is_modpack then
-					element = retval[i]
-					break
+						not retval[i].is_modpack then
+					if core.is_yes(value) or retval[i].virtual_path == value then
+						retval[i].enabled = true
+						mod_found = true
+						break
+					elseif fallback_found then
+						-- Only allow fallback if only one mod matches
+						fallback_mod = nil
+					else
+						fallback_found = true
+						fallback_mod = retval[i]
+					end
 				end
 			end
-			if element ~= nil then
-				element.enabled = value ~= "false" and value ~= "nil" and value
-			else
-				core.log("info", "Mod: " .. key .. " " .. dump(value) .. " but not found")
+
+			if not mod_found then
+				if fallback_mod and value:find("/") then
+					fallback_mod.enabled = true
+				else
+					core.log("info", "Mod: " .. key .. " " .. dump(value) .. " but not found")
+				end
 			end
 		end
 	end
@@ -872,45 +874,6 @@ function pkgmgr.refresh_globals()
 end
 
 --------------------------------------------------------------------------------
-function pkgmgr.identify_filetype(name)
-
-	if name:sub(-3):lower() == "zip" then
-		return {
-				name = name,
-				type = "zip"
-				}
-	end
-
-	if name:sub(-6):lower() == "tar.gz" or
-		name:sub(-3):lower() == "tgz"then
-		return {
-				name = name,
-				type = "tgz"
-				}
-	end
-
-	if name:sub(-6):lower() == "tar.bz2" then
-		return {
-				name = name,
-				type = "tbz"
-				}
-	end
-
-	if name:sub(-2):lower() == "7z" then
-		return {
-				name = name,
-				type = "7z"
-				}
-	end
-
-	return {
-		name = name,
-		type = "ukn"
-	}
-end
-
-
---------------------------------------------------------------------------------
 function pkgmgr.find_by_gameid(gameid)
 	for i=1,#pkgmgr.games,1 do
 		if pkgmgr.games[i].id == gameid then
@@ -925,7 +888,7 @@ function pkgmgr.get_game_mods(gamespec, retval)
 	if gamespec ~= nil and
 		gamespec.gamemods_path ~= nil and
 		gamespec.gamemods_path ~= "" then
-		get_mods(gamespec.gamemods_path, retval)
+		get_mods(gamespec.gamemods_path, ("games/%s/mods"):format(gamespec.id), retval)
 	end
 end
 
diff --git a/builtin/mainmenu/tab_about.lua b/builtin/mainmenu/tab_about.lua
index cb566f773..3336786ba 100644
--- a/builtin/mainmenu/tab_about.lua
+++ b/builtin/mainmenu/tab_about.lua
@@ -38,32 +38,35 @@ local core_developers = {
 	"Lars Hofhansl <larsh@apache.org>",
 	"Pierre-Yves Rollo <dev@pyrollo.com>",
 	"v-rob <robinsonvincent89@gmail.com>",
+	"hecks",
+	"Hugues Ross <hugues.ross@gmail.com>",
+	"Dmitry Kostenko (x2048) <codeforsmile@gmail.com>",
 }
 
 -- For updating active/previous contributors, see the script in ./util/gather_git_credits.py
 
 local active_contributors = {
-	"Wuzzy [devtest game, visual corrections]",
-	"Zughy [Visual improvements, various fixes]",
-	"Maksim (MoNTE48) [Android]",
+	"Wuzzy [I18n for builtin, liquid features, fixes]",
+	"Zughy [Various features and fixes]",
 	"numzero [Graphics and rendering]",
-	"appgurueu [Various internal fixes]",
-	"Desour [Formspec and vector API changes]",
-	"HybridDog [Rendering fixes and documentation]",
-	"Hugues Ross [Graphics-related improvements]",
-	"ANAND (ClobberXD) [Mouse buttons rebinding]",
-	"luk3yx [Fixes]",
-	"hecks [Audiovisuals, Lua API]",
-	"LoneWolfHT [Object crosshair, documentation fixes]",
-	"Lejo [Server-related improvements]",
-	"EvidenceB [Compass HUD element]",
-	"Paul Ouellette (pauloue) [Lua API, documentation]",
-	"TheTermos [Collision detection, physics]",
+	"Desour [Internal fixes, Clipboard on X11]",
+	"Lars Müller [Various internal fixes]",
+	"JosiahWI [CMake, cleanups and fixes]",
+	"HybridDog [builtin, documentation]",
+	"Jude Melton-Houghton [Database implementation]",
+	"savilli [Fixes]",
+	"Liso [Shadow Mapping]",
+	"MoNTE48 [Build fix]",
+	"Jean-Patrick Guerrero (kilbith) [Fixes]",
+	"ROllerozxa [Code cleanups]",
+	"Lejo [bitop library integration]",
+	"LoneWolfHT [Build fixes]",
+	"NeroBurner [Joystick]",
+	"Elias Fleckenstein [Internal fixes]",
 	"David CARLIER [Unix & Haiku build fixes]",
-	"dcbrwn [Object shading]",
-	"Elias Fleckenstein [API features/fixes]",
-	"Jean-Patrick Guerrero (kilbith) [model element, visual fixes]",
-	"k.h.lai [Memory leak fixes, documentation]",
+	"pecksin [Clickable web links]",
+	"srfqi [Android & rendering fixes]",
+	"EvidenceB [Formspec]",
 }
 
 local previous_core_developers = {
@@ -80,6 +83,7 @@ local previous_core_developers = {
 	"Zeno",
 	"ShadowNinja <shadowninja@minetest.net>",
 	"Auke Kok (sofar) <sofar@foo-projects.org>",
+	"Aaron Suen <warr1024@gmail.com>",
 }
 
 local previous_contributors = {
@@ -90,10 +94,10 @@ local previous_contributors = {
 	"MirceaKitsune <mirceakitsune@gmail.com>",
 	"Constantin Wenger (SpeedProg)",
 	"Ciaran Gultnieks (CiaranG)",
-	"stujones11 [Android UX improvements]",
-	"Rogier <rogier777@gmail.com> [Fixes]",
-	"Gregory Currie (gregorycu) [optimisation]",
-	"srifqi [Fixes]",
+	"Paul Ouellette (pauloue)",
+	"stujones11",
+	"Rogier <rogier777@gmail.com>",
+	"Gregory Currie (gregorycu)",
 	"JacobF",
 	"Jeija <jeija@mesecons.net> [HTTP, particles]",
 }
diff --git a/builtin/mainmenu/tab_content.lua b/builtin/mainmenu/tab_content.lua
index 1bffeeb22..a366d4ab4 100644
--- a/builtin/mainmenu/tab_content.lua
+++ b/builtin/mainmenu/tab_content.lua
@@ -88,12 +88,14 @@ local function get_formspec(tabview, name, tabdata)
 		tabdata.selected_pkg = 1
 	end
 
+	local use_technical_names = core.settings:get_bool("show_technical_names")
+
 
 	local retval =
 		"label[0.05,-0.25;".. fgettext("Installed Packages:") .. "]" ..
 		"tablecolumns[color;tree;text]" ..
 		"table[0,0.25;5.1,4.3;pkglist;" ..
-		pkgmgr.render_packagelist(packages) ..
+		pkgmgr.render_packagelist(packages, use_technical_names) ..
 		";" .. tabdata.selected_pkg .. "]" ..
 		"button[0,4.85;5.25,0.5;btn_contentdb;".. fgettext("Browse online content") .. "]"
 
@@ -124,9 +126,17 @@ local function get_formspec(tabview, name, tabdata)
 			desc = info.description
 		end
 
+		local title_and_name
+		if selected_pkg.type == "game" then
+			title_and_name = selected_pkg.name
+		else
+			title_and_name = (selected_pkg.title or selected_pkg.name) .. "\n" ..
+				core.colorize("#BFBFBF", selected_pkg.name)
+		end
+
 		retval = retval ..
 				"image[5.5,0;3,2;" .. core.formspec_escape(modscreenshot) .. "]" ..
-				"label[8.25,0.6;" .. core.formspec_escape(selected_pkg.name) .. "]" ..
+				"label[8.25,0.6;" .. core.formspec_escape(title_and_name) .. "]" ..
 				"box[5.5,2.2;6.15,2.35;#000]"
 
 		if selected_pkg.type == "mod" then
@@ -214,6 +224,9 @@ local function handle_doubleclick(pkg, pkg_name)
 			core.settings:set("texture_path", pkg.path)
 		end
 		packages = nil
+
+		mm_game_theme.init()
+		mm_game_theme.reset()
 	elseif pkg.is_clientside then
 		pkgmgr.enable_mod({data = {list = packages, selected_mod = pkg_name}})
 		packages = nil
@@ -276,17 +289,17 @@ local function handle_buttons(tabview, fields, tabname, tabdata)
 		return true
 	end
 
-	if fields.btn_mod_mgr_use_txp then
-		local txp = packages:get_list()[tabdata.selected_pkg]
-		core.settings:set("texture_path", txp.path)
-		packages = nil
-		return true
-	end
-
+	if fields.btn_mod_mgr_use_txp or fields.btn_mod_mgr_disable_txp then
+		local txp_path = ""
+		if fields.btn_mod_mgr_use_txp then
+			txp_path = packages:get_list()[tabdata.selected_pkg].path
+		end
 
-	if fields.btn_mod_mgr_disable_txp then
-		core.settings:set("texture_path", "")
+		core.settings:set("texture_path", txp_path)
 		packages = nil
+
+		mm_game_theme.init()
+		mm_game_theme.reset()
 		return true
 	end
 
diff --git a/builtin/mainmenu/tab_local.lua b/builtin/mainmenu/tab_local.lua
index be5f905ac..e77c6f04d 100644
--- a/builtin/mainmenu/tab_local.lua
+++ b/builtin/mainmenu/tab_local.lua
@@ -33,10 +33,30 @@ if enable_gamebar then
 		return game
 	end
 
+	-- Apply menu changes from given game
+	function apply_game(game)
+		core.set_topleft_text(game.name)
+		core.settings:set("menu_last_game", game.id)
+		menudata.worldlist:set_filtercriteria(game.id)
+
+		mm_game_theme.update("singleplayer", game) -- this refreshes the formspec
+
+		local index = filterlist.get_current_index(menudata.worldlist,
+			tonumber(core.settings:get("mainmenu_last_selected_world")))
+		if not index or index < 1 then
+			local selected = core.get_textlist_index("sp_worlds")
+			if selected ~= nil and selected < #menudata.worldlist:get_list() then
+				index = selected
+			else
+				index = #menudata.worldlist:get_list()
+			end
+		end
+		menu_worldmt_legacy(index)
+	end
+
 	function singleplayer_refresh_gamebar()
 
 		local old_bar = ui.find_by_name("game_button_bar")
-
 		if old_bar ~= nil then
 			old_bar:delete()
 		end
@@ -51,26 +71,10 @@ if enable_gamebar then
 				return true
 			end
 
-			for key,value in pairs(fields) do
-				for j=1,#pkgmgr.games,1 do
-					if ("game_btnbar_" .. pkgmgr.games[j].id == key) then
-						mm_texture.update("singleplayer", pkgmgr.games[j])
-						core.set_topleft_text(pkgmgr.games[j].name)
-						core.settings:set("menu_last_game",pkgmgr.games[j].id)
-						menudata.worldlist:set_filtercriteria(pkgmgr.games[j].id)
-						local index = filterlist.get_current_index(menudata.worldlist,
-							tonumber(core.settings:get("mainmenu_last_selected_world")))
-						if not index or index < 1 then
-							local selected = core.get_textlist_index("sp_worlds")
-							if selected ~= nil and selected < #menudata.worldlist:get_list() then
-								index = selected
-							else
-								index = #menudata.worldlist:get_list()
-							end
-						end
-						menu_worldmt_legacy(index)
-						return true
-					end
+			for _, game in ipairs(pkgmgr.games) do
+				if fields["game_btnbar_" .. game.id] then
+					apply_game(game)
+					return true
 				end
 			end
 		end
@@ -79,25 +83,22 @@ if enable_gamebar then
 			game_buttonbar_button_handler,
 			{x=-0.3,y=5.9}, "horizontal", {x=12.4,y=1.15})
 
-		for i=1,#pkgmgr.games,1 do
-			local btn_name = "game_btnbar_" .. pkgmgr.games[i].id
+		for _, game in ipairs(pkgmgr.games) do
+			local btn_name = "game_btnbar_" .. game.id
 
 			local image = nil
 			local text = nil
-			local tooltip = core.formspec_escape(pkgmgr.games[i].name)
+			local tooltip = core.formspec_escape(game.name)
 
-			if pkgmgr.games[i].menuicon_path ~= nil and
-				pkgmgr.games[i].menuicon_path ~= "" then
-				image = core.formspec_escape(pkgmgr.games[i].menuicon_path)
+			if (game.menuicon_path or "") ~= "" then
+				image = core.formspec_escape(game.menuicon_path)
 			else
-
-				local part1 = pkgmgr.games[i].id:sub(1,5)
-				local part2 = pkgmgr.games[i].id:sub(6,10)
-				local part3 = pkgmgr.games[i].id:sub(11)
+				local part1 = game.id:sub(1,5)
+				local part2 = game.id:sub(6,10)
+				local part3 = game.id:sub(11)
 
 				text = part1 .. "\n" .. part2
-				if part3 ~= nil and
-					part3 ~= "" then
+				if part3 ~= "" then
 					text = text .. "\n" .. part3
 				end
 			end
@@ -147,8 +148,12 @@ local function get_formspec(tabview, name, tabdata)
 				tonumber(core.settings:get("mainmenu_last_selected_world")))
 	local list = menudata.worldlist:get_list()
 	local world = list and index and list[index]
-	local gameid = world and world.gameid
-	local game = gameid and pkgmgr.find_by_gameid(gameid)
+	local game
+	if world then
+		game = pkgmgr.find_by_gameid(world.gameid)
+	else
+		game = current_game()
+	end
 	local disabled_settings = get_disabled_settings(game)
 
 	local creative, damage, host = "", "", ""
@@ -182,7 +187,7 @@ local function get_formspec(tabview, name, tabdata)
 			damage ..
 			host ..
 			"textlist[3.9,0.4;7.9,3.45;sp_worlds;" ..
-			menu_render_worldlist() ..
+			menu_render_worldlist(not enable_gamebar) ..
 			";" .. index .. "]"
 
 	if core.settings:get_bool("enable_server") and disabled_settings["enable_server"] == nil then
@@ -319,11 +324,11 @@ local function main_button_handler(this, fields, name, tabdata)
 	end
 
 	if fields["world_create"] ~= nil then
-		local create_world_dlg = create_create_world_dlg(true)
+		local create_world_dlg = create_create_world_dlg(enable_gamebar)
 		create_world_dlg:set_parent(this)
 		this:hide()
 		create_world_dlg:show()
-		mm_texture.update("singleplayer", current_game())
+		mm_game_theme.update("singleplayer", current_game())
 		return true
 	end
 
@@ -340,7 +345,7 @@ local function main_button_handler(this, fields, name, tabdata)
 				delete_world_dlg:set_parent(this)
 				this:hide()
 				delete_world_dlg:show()
-				mm_texture.update("singleplayer",current_game())
+				mm_game_theme.update("singleplayer",current_game())
 			end
 		end
 
@@ -358,7 +363,7 @@ local function main_button_handler(this, fields, name, tabdata)
 				configdialog:set_parent(this)
 				this:hide()
 				configdialog:show()
-				mm_texture.update("singleplayer",current_game())
+				mm_game_theme.update("singleplayer",current_game())
 			end
 		end
 
@@ -371,11 +376,8 @@ if enable_gamebar then
 	function on_change(type, old_tab, new_tab)
 		if (type == "ENTER") then
 			local game = current_game()
-
 			if game then
-				menudata.worldlist:set_filtercriteria(game.id)
-				core.set_topleft_text(game.name)
-				mm_texture.update("singleplayer",game)
+				apply_game(game)
 			end
 
 			singleplayer_refresh_gamebar()
@@ -387,7 +389,7 @@ if enable_gamebar then
 				gamebar:hide()
 			end
 			core.set_topleft_text("")
-			mm_texture.update(new_tab,nil)
+			mm_game_theme.update(new_tab,nil)
 		end
 	end
 end
diff --git a/builtin/mainmenu/tab_settings.lua b/builtin/mainmenu/tab_settings.lua
index f06e35872..0e761d324 100644
--- a/builtin/mainmenu/tab_settings.lua
+++ b/builtin/mainmenu/tab_settings.lua
@@ -247,7 +247,7 @@ local function handle_settings_buttons(this, fields, tabname, tabdata)
 		adv_settings_dlg:set_parent(this)
 		this:hide()
 		adv_settings_dlg:show()
-		--mm_texture.update("singleplayer", current_game())
+		--mm_game_theme.update("singleplayer", current_game())
 		return true
 	end
 	if fields["cb_smooth_lighting"] then
@@ -275,13 +275,7 @@ local function handle_settings_buttons(this, fields, tabname, tabdata)
 		return true
 	end
 	if fields["cb_shaders"] then
-		if (core.settings:get("video_driver") == "direct3d8" or
-				core.settings:get("video_driver") == "direct3d9") then
-			core.settings:set("enable_shaders", "false")
-			gamedata.errormessage = fgettext("To enable shaders the OpenGL driver needs to be used.")
-		else
-			core.settings:set("enable_shaders", fields["cb_shaders"])
-		end
+		core.settings:set("enable_shaders", fields["cb_shaders"])
 		return true
 	end
 	if fields["cb_tonemapping"] then
@@ -370,11 +364,11 @@ local function handle_settings_buttons(this, fields, tabname, tabdata)
 		core.settings:set("enable_dynamic_shadows", "false")
 	else
 		local shadow_presets = {
-			[2] = { 80,  512,  "true", 0, "false" },
-			[3] = { 120, 1024, "true", 1, "false" },
-			[4] = { 350, 2048, "true", 1, "false" },
-			[5] = { 350, 2048, "true", 2,  "true" },
-			[6] = { 450, 4096, "true", 2,  "true" },
+			[2] = { 55,  512,  "true", 0, "false" },
+			[3] = { 82,  1024, "true", 1, "false" },
+			[4] = { 240, 2048, "true", 1, "false" },
+			[5] = { 240, 2048, "true", 2,  "true" },
+			[6] = { 300, 4096, "true", 2,  "true" },
 		}
 		local s = shadow_presets[table.indexof(labels.shadow_levels, fields["dd_shadows"])]
 		if s then
diff --git a/builtin/mainmenu/tests/serverlistmgr_spec.lua b/builtin/mainmenu/tests/serverlistmgr_spec.lua
index a091959fb..ab7a6c60c 100644
--- a/builtin/mainmenu/tests/serverlistmgr_spec.lua
+++ b/builtin/mainmenu/tests/serverlistmgr_spec.lua
@@ -1,4 +1,5 @@
 _G.core = {}
+_G.vector = {metatable = {}}
 _G.unpack = table.unpack
 _G.serverlistmgr = {}
 
diff --git a/builtin/profiler/instrumentation.lua b/builtin/profiler/instrumentation.lua
index 6b951a2c2..f80314b32 100644
--- a/builtin/profiler/instrumentation.lua
+++ b/builtin/profiler/instrumentation.lua
@@ -102,8 +102,9 @@ local function instrument(def)
 		-- also called https://en.wikipedia.org/wiki/Continuation_passing_style
 		-- Compared to table creation and unpacking it won't lose `nil` returns
 		-- and is expected to be faster
-		-- `measure` will be executed after time() and func(...)
-		return measure(modname, instrument_name, time(), func(...))
+		-- `measure` will be executed after func(...)
+		local start = time()
+		return measure(modname, instrument_name, start, func(...))
 	end
 end
 
diff --git a/builtin/settingtypes.txt b/builtin/settingtypes.txt
index e023aeab7..2e0bb560a 100644
--- a/builtin/settingtypes.txt
+++ b/builtin/settingtypes.txt
@@ -146,17 +146,17 @@ enable_joysticks (Enable joysticks) bool false
 joystick_id (Joystick ID) int 0
 
 #    The type of joystick
-joystick_type (Joystick type) enum auto auto,generic,xbox
+joystick_type (Joystick type) enum auto auto,generic,xbox,dragonrise_gamecube
 
 #    The time in seconds it takes between repeated events
 #    when holding down a joystick button combination.
 repeat_joystick_button_time (Joystick button repetition interval) float 0.17 0.001
 
-#    The deadzone of the joystick
-joystick_deadzone (Joystick deadzone) int 2048
+#    The dead zone of the joystick
+joystick_deadzone (Joystick dead zone) int 2048
 
 #    The sensitivity of the joystick axes for moving the
-#    ingame view frustum around.
+#    in-game view frustum around.
 joystick_frustum_sensitivity (Joystick frustum sensitivity) float 170
 
 #    Key for moving the player forward.
@@ -463,9 +463,9 @@ keymap_decrease_viewing_range_min (View range decrease key) key -
 
 [**Basic]
 
-#    Whether nametag backgrounds should be shown by default.
+#    Whether name tag backgrounds should be shown by default.
 #    Mods may still set a background.
-show_nametag_backgrounds (Show nametag backgrounds by default) bool true
+show_nametag_backgrounds (Show name tag backgrounds by default) bool true
 
 #    Enable vertex buffer objects.
 #    This should greatly improve graphics performance.
@@ -487,6 +487,10 @@ connected_glass (Connect glass) bool false
 #    Disable for speed or for different looks.
 smooth_lighting (Smooth lighting) bool true
 
+#    Enables tradeoffs that reduce CPU load or increase rendering performance
+#    at the expense of minor visual glitches that do not impact game playability.
+performance_tradeoffs (Tradeoffs for performance) bool false
+
 #    Clouds are a client side effect.
 enable_clouds (Clouds) bool true
 
@@ -501,7 +505,7 @@ enable_particles (Digging particles) bool true
 
 [**Filtering]
 
-#    Use mip mapping to scale textures. May slightly increase performance,
+#    Use mipmapping to scale textures. May slightly increase performance,
 #    especially when using a high resolution texture pack.
 #    Gamma correct downscaling is not supported.
 mip_map (Mipmapping) bool false
@@ -600,9 +604,10 @@ enable_waving_plants (Waving plants) bool false
 #    Requires shaders to be enabled.
 enable_dynamic_shadows (Dynamic shadows) bool false
 
-#    Set the shadow strength.
+#    Set the shadow strength gamma.
+#    Adjusts the intensity of in-game dynamic shadows.
 #    Lower value means lighter shadows, higher value means darker shadows.
-shadow_strength (Shadow strength) float 0.2 0.05 1.0
+shadow_strength_gamma (Shadow strength gamma) float 1.0 0.1 10.0
 
 #    Maximum distance to render shadows.
 shadow_map_max_distance (Shadow map max distance in nodes to render shadows) float 120.0 10.0 1000.0
@@ -621,12 +626,12 @@ shadow_map_texture_32bit (Shadow map texture in 32 bits) bool true
 #    On true uses Poisson disk to make "soft shadows". Otherwise uses PCF filtering.
 shadow_poisson_filter (Poisson filtering) bool true
 
-#   Define shadow filtering quality
+#   Define shadow filtering quality.
 #   This simulates the soft shadows effect by applying a PCF or Poisson disk
 #   but also uses more resources.
 shadow_filters (Shadow filter quality) enum 1 0,1,2
 
-#    Enable colored shadows. 
+#    Enable colored shadows.
 #    On true translucent nodes cast colored shadows. This is expensive.
 shadow_map_color (Colored shadows) bool false
 
@@ -638,10 +643,10 @@ shadow_update_frames (Map shadows update frames) int 8 1 16
 
 #    Set the soft shadow radius size.
 #    Lower values mean sharper shadows, bigger values mean softer shadows.
-#    Minimum value: 1.0; maxiumum value: 10.0
+#    Minimum value: 1.0; maximum value: 10.0
 shadow_soft_radius (Soft shadow radius) float 1.0 1.0 10.0
 
-#    Set the tilt of Sun/Moon orbit in degrees
+#    Set the tilt of Sun/Moon orbit in degrees.
 #    Value of 0 means no tilt / vertical orbit.
 #    Minimum value: 0.0; maximum value: 60.0
 shadow_sky_body_orbit_tilt (Sky Body Orbit Tilt) float 0.0 0.0 60.0
@@ -801,7 +806,7 @@ desynchronize_mapblock_texture_animation (Desynchronize block animation) bool tr
 #    Useful if there's something to be displayed right or left of hotbar.
 hud_hotbar_max_width (Maximum hotbar width) float 1.0
 
-#    Modifies the size of the hudbar elements.
+#    Modifies the size of the HUD elements.
 hud_scaling (HUD scale factor) float 1.0
 
 #    Enables caching of facedir rotated meshes.
@@ -865,6 +870,10 @@ autoscale_mode (Autoscaling mode) enum disable disable,enable,force
 #    A restart is required after changing this.
 show_entity_selectionbox (Show entity selection boxes) bool false
 
+#    Distance in nodes at which transparency depth sorting is enabled
+#    Use this to limit the performance impact of transparency depth sorting
+transparency_sorting_distance (Transparency Sorting Distance) int 16 0 128
+
 [*Menus]
 
 #    Use a cloud animation for the main menu background.
@@ -894,10 +903,6 @@ tooltip_show_delay (Tooltip delay) int 400
 #    Append item name to tooltip.
 tooltip_append_itemname (Append item name) bool false
 
-#    Whether FreeType fonts are used, requires FreeType support to be compiled in.
-#    If disabled, bitmap and XML vectors fonts are used instead.
-freetype (FreeType fonts) bool true
-
 font_bold (Font bold by default) bool false
 
 font_italic (Font italic by default) bool false
@@ -908,12 +913,16 @@ font_shadow (Font shadow) int 1
 #    Opaqueness (alpha) of the shadow behind the default font, between 0 and 255.
 font_shadow_alpha (Font shadow alpha) int 127 0 255
 
-#    Font size of the default font in point (pt).
+#    Font size of the default font where 1 unit = 1 pixel at 96 DPI
 font_size (Font size) int 16 1
 
-#    Path to the default font.
-#    If “freetype” setting is enabled: Must be a TrueType font.
-#    If “freetype” setting is disabled: Must be a bitmap or XML vectors font.
+#    For pixel-style fonts that do not scale well, this ensures that font sizes used
+#    with this font will always be divisible by this value, in pixels. For instance,
+#    a pixel font 16 pixels tall should have this set to 16, so it will only ever be
+#    sized 16, 32, 48, etc., so a mod requesting a size of 25 will get 32.
+font_size_divisible_by (Font size divisible by) int 1 1
+
+#    Path to the default font. Must be a TrueType font.
 #    The fallback font will be used if the font cannot be loaded.
 font_path (Regular font path) filepath fonts/Arimo-Regular.ttf
 
@@ -921,12 +930,16 @@ font_path_bold (Bold font path) filepath fonts/Arimo-Bold.ttf
 font_path_italic (Italic font path) filepath fonts/Arimo-Italic.ttf
 font_path_bold_italic (Bold and italic font path) filepath fonts/Arimo-BoldItalic.ttf
 
-#    Font size of the monospace font in point (pt).
-mono_font_size (Monospace font size) int 15 1
+#    Font size of the monospace font where 1 unit = 1 pixel at 96 DPI
+mono_font_size (Monospace font size) int 16 1
 
-#    Path to the monospace font.
-#    If “freetype” setting is enabled: Must be a TrueType font.
-#    If “freetype” setting is disabled: Must be a bitmap or XML vectors font.
+#    For pixel-style fonts that do not scale well, this ensures that font sizes used
+#    with this font will always be divisible by this value, in pixels. For instance,
+#    a pixel font 16 pixels tall should have this set to 16, so it will only ever be
+#    sized 16, 32, 48, etc., so a mod requesting a size of 25 will get 32.
+mono_font_size_divisible_by (Monospace font size divisible by) int 1 1
+
+#    Path to the monospace font. Must be a TrueType font.
 #    This font is used for e.g. the console and profiler screen.
 mono_font_path (Monospace font path) filepath fonts/Cousine-Regular.ttf
 
@@ -934,9 +947,7 @@ mono_font_path_bold (Bold monospace font path) filepath fonts/Cousine-Bold.ttf
 mono_font_path_italic (Italic monospace font path) filepath fonts/Cousine-Italic.ttf
 mono_font_path_bold_italic (Bold and italic monospace font path) filepath fonts/Cousine-BoldItalic.ttf
 
-#    Path of the fallback font.
-#    If “freetype” setting is enabled: Must be a TrueType font.
-#    If “freetype” setting is disabled: Must be a bitmap or XML vectors font.
+#    Path of the fallback font. Must be a TrueType font.
 #    This font will be used for certain languages or if the default font is unavailable.
 fallback_font_path (Fallback font path) filepath fonts/DroidSansFallbackFull.ttf
 
@@ -949,7 +960,7 @@ chat_font_size (Chat font size) int 0
 screenshot_path (Screenshot folder) path screenshots
 
 #    Format of screenshots.
-screenshot_format (Screenshot format) enum png png,jpg,bmp,pcx,ppm,tga
+screenshot_format (Screenshot format) enum png png,jpg
 
 #    Screenshot quality. Only used for JPEG format.
 #    1 means worst quality; 100 means best quality.
@@ -961,6 +972,9 @@ screenshot_quality (Screenshot quality) int 0 0 100
 #    Adjust dpi configuration to your screen (non X11/Android only) e.g. for 4k screens.
 screen_dpi (DPI) int 72 1
 
+#    Adjust the detected display density, used for scaling UI elements.
+display_density_factor (Display Density Scaling Factor) float 1
+
 #    Windows systems only: Start Minetest with the command line window in the background.
 #    Contains the same information as the file debug.txt (default name).
 enable_console (Enable console window) bool false
@@ -985,8 +999,8 @@ mute_sound (Mute sound) bool false
 
 [Client]
 
-#    Clickable weblinks (middle-click or ctrl-left-click) enabled in chat console output.
-clickable_chat_weblinks (Chat weblinks) bool false
+#    Clickable weblinks (middle-click or Ctrl+left-click) enabled in chat console output.
+clickable_chat_weblinks (Chat weblinks) bool true
 
 #    Optional override for chat weblink color.
 chat_weblink_color (Weblink color) string
@@ -1044,6 +1058,12 @@ client_unload_unused_data_timeout (Mapblock unload timeout) int 600
 #    Set to -1 for unlimited amount.
 client_mapblock_limit (Mapblock limit) int 7500
 
+#    Whether to show technical names.
+#    Affects mods and texture packs in the Content and Select Mods menus, as well as
+#    setting names in All Settings.
+#    Controlled by the checkbox in the "All settings" menu.
+show_technical_names (Show technical names) bool false
+
 #    Whether to show the client debug info (has the same effect as hitting F5).
 show_debug (Show debug info) bool false
 
@@ -1114,7 +1134,7 @@ max_packets_per_iteration (Max. packets per iteration) int 1024
 
 #    Compression level to use when sending mapblocks to the client.
 #    -1 - use default compression level
-#     0 - least compresson, fastest
+#     0 - least compression, fastest
 #     9 - best compression, slowest
 map_compression_level_net (Map Compression Level for Network Transfer) int -1 -1 9
 
@@ -1178,7 +1198,7 @@ enable_mod_channels (Mod channels) bool false
 #    If this is set, players will always (re)spawn at the given position.
 static_spawnpoint (Static spawnpoint) string
 
-#    If enabled, new players cannot join with an empty password.
+#    If enabled, players cannot join without a password or change theirs to an empty password.
 disallow_empty_password (Disallow empty passwords) bool false
 
 #    If enabled, disable cheat prevention in multiplayer.
@@ -1300,7 +1320,7 @@ movement_gravity (Gravity) float 9.81
 deprecated_lua_api_handling (Deprecated Lua API handling) enum log none,log,error
 
 #    Number of extra blocks that can be loaded by /clearobjects at once.
-#    This is a trade-off between sqlite transaction overhead and
+#    This is a trade-off between SQLite transaction overhead and
 #    memory consumption (4096=100MB, as a rule of thumb).
 max_clearobjects_extra_loaded_blocks (Max. clearobjects extra blocks) int 4096
 
@@ -1309,14 +1329,14 @@ max_clearobjects_extra_loaded_blocks (Max. clearobjects extra blocks) int 4096
 server_unload_unused_data_timeout (Unload unused server data) int 29
 
 #    Maximum number of statically stored objects in a block.
-max_objects_per_block (Maximum objects per block) int 64
+max_objects_per_block (Maximum objects per block) int 256
 
 #    See https://www.sqlite.org/pragma.html#pragma_synchronous
 sqlite_synchronous (Synchronous SQLite) enum 2 0,1,2
 
 #    Compression level to use when saving mapblocks to disk.
 #    -1 - use default compression level
-#     0 - least compresson, fastest
+#     0 - least compression, fastest
 #     9 - best compression, slowest
 map_compression_level_disk (Map Compression Level for Disk Storage) int -1 -1 9
 
@@ -1423,8 +1443,8 @@ instrument.abm (Active Block Modifiers) bool true
 #    Instrument the action function of Loading Block Modifiers on registration.
 instrument.lbm (Loading Block Modifiers) bool true
 
-#    Instrument chatcommands on registration.
-instrument.chatcommand (Chatcommands) bool true
+#    Instrument chat commands on registration.
+instrument.chatcommand (Chat commands) bool true
 
 #    Instrument global callback functions on registration.
 #    (anything you pass to a minetest.register_*() function)
@@ -1460,7 +1480,8 @@ language (Language) enum   ,be,bg,ca,cs,da,de,el,en,eo,es,et,eu,fi,fr,gd,gl,hu,i
 #    -    action
 #    -    info
 #    -    verbose
-debug_log_level (Debug log level) enum action ,none,error,warning,action,info,verbose
+#    -    trace
+debug_log_level (Debug log level) enum action ,none,error,warning,action,info,verbose,trace
 
 #    If the file size of debug.txt exceeds the number of megabytes specified in
 #    this setting when it is opened, the file is moved to debug.txt.1,
@@ -1469,7 +1490,7 @@ debug_log_level (Debug log level) enum action ,none,error,warning,action,info,ve
 debug_log_size_max (Debug log file size threshold) int 50
 
 #    Minimal level of logging to be written to chat.
-chat_log_level (Chat log level) enum error ,none,error,warning,action,info,verbose
+chat_log_level (Chat log level) enum error ,none,error,warning,action,info,verbose,trace
 
 #    Enable IPv6 support (for both client and server).
 #    Required for IPv6 connections to work at all.
@@ -1514,11 +1535,11 @@ max_block_generate_distance (Max block generate distance) int 10
 #    Limit of map generation, in nodes, in all 6 directions from (0, 0, 0).
 #    Only mapchunks completely within the mapgen limit are generated.
 #    Value is stored per-world.
-mapgen_limit (Map generation limit) int 31000 0 31000
+mapgen_limit (Map generation limit) int 31007 0 31007
 
 #    Global map generation attributes.
 #    In Mapgen v6 the 'decorations' flag controls all decorations except trees
-#    and junglegrass, in all other mapgens this flag controls all decorations.
+#    and jungle grass, in all other mapgens this flag controls all decorations.
 mg_flags (Mapgen flags) flags caves,dungeons,light,decorations,biomes,ores caves,dungeons,light,decorations,biomes,ores,nocaves,nodungeons,nolight,nodecorations,nobiomes,noores
 
 [*Biome API temperature and humidity noise parameters]
@@ -2270,7 +2291,7 @@ contentdb_max_concurrent_downloads (ContentDB Max Concurrent Downloads) int 3
 [Cheat Menu]
 
 #   Font to use for cheat menu
-cheat_menu_font (MenuFont) enum FM_Mono FM_Standard,FM_Mono,FM_Fallback,FM_Simple,FM_SimpleMono,FM_MaxMode,FM_Unspecified
+cheat_menu_font (MenuFont) enum FM_Mono FM_Standard,FM_Mono,FM_Fallback,FM_MaxMode,FM_Unspecified
 
 #   (RGB value)
 cheat_menu_bg_color (Cell background color) v3f 255, 145, 88