Import filter code from old filter-smtp branch. And lake it build again.
Time to start moving forward.
Merge branch 'master' of ssh://ssh.poolp.org/git/opensmtpd
when sending mail to user+tag@ and maildir is enabled, do not create
.tag folder automagically, instead use it if it exists or append to
the original maildir otherwise
Merge branch 'master' into portable

Conflicts:
	smtpd/mfa_session.c
	smtpd/smtpd-defines.h