make GotMArc::parse return an hash reference instead of a list of strings

use $mid.$partno.$ext for attachments rather than random strings Keeps the attachment file names stable while it also allows to drop the dep on Tempfile, the unveil of /tmp and the fattr pledge promise too.

build a cache of hashes for each thread The idea is to use this cache to spot changed threads and re-export all the mail of the threads that changed. This will allow to add thread navigation hints on each exported mail and have them up-to-date. This makes the "skip if already exported" logic in mexp redundant and incomplete. pe will decide whether to export or not, and mexp blindly do the work.

pe: restrict pledge the children are pre-forked, so at runtime only "stdio" is needed.

set binmode utf8 for the page file handler avoids the "Wide character in print at ./mkindex line 152, <> line 2751" warnings.

fix last sender name/date in the index pick up the *latest* From/Date for the indexes, not what happened to be the last mail rendered in that thread. spotted by stsp@

mkindex: show the latest date/sender per thread

"humanize" the attachment size

woops, don't extract if already did

retire filter-export; set everything to filter-ignore

don't rely on filter-export anymore Instead, parse the output of `mshow -t' and extract, one by one, the interesting parts. This allows to generate a better listing (we know name and size!) and to decide how to call the files (the extension is important for httpd!)

export image/gif, jpeg and png too

use (part) of the original file name instead of the message-id

urlencode the mail/thread id reminded by semarie@, thanks!

style