upas/fs: put date822 into the index, fix from and replyto handling

the date, from and replyto fields where unstable, in that the value
read depended on the state of the cache.

fixing the from and replyto fields is easy, we just handle the
substitution in parsebody().

the date field however requires us to put the date822 into the index
so it can be recovered without requiering to reparse the header
(and body, as we might have a message/rfc822 message with promoted
fields).

with these changes, the fields will be consistent and independnet
of the cache state.

a small optimization also has been added:

after parsing the body, attachments and substitution of from/replyto,
the boundary and unixfrom strings are not needed anymore and can
be freed early.

0 files changed, 0 insertions, 0 deletions