Changes:
- New $disarmedfrom$ variable for control/customheaders. Expands to
the original From: header value with '<', '>', '@' replaced by
'(', ')', '=' for safe use in display names ("me@here.com" ->
"me=here.com"). Complements $posteraddr$ (raw email address).
- mlmmj-sub: batch subscribe via stdin with -a -. Reads one address
per line, skips empty lines and '#' comments.
- MIME type detection and rejection in mlmmj-receive. Prevent
multipart/alternative or multipart/mixed messages from being posted
to the list (control/mimedeny).
- Fix: fdopendir UB by using dirfd() instead of raw fd
- Various code simplifications (send_digest, bouncemail, do_access, initsmtp)
- Many new unit tests and test fixes
- README: document DKIM/From munging with $posteraddr$ and $disarmedfrom$
- README.sendmail.md: update documentation
Baptiste Daroussin
15c8f1c11e