start implementing the new mfa.
Merge branch 'master' into issue125-new-filters
fixes and traces
more work in the mfa/filter code
fixes
fixes and add 2 test filters
fixes
Merge branch 'master' into issue125-new-filters
send commit/rollback event to the mfa
Merge branch 'master' into portable

Conflicts:
	smtpd/libsmtpdfilter/Makefile
	smtpd/smtp_session.c
do not use ss_len if not defined
build mfa_session.c
- use SA_LEN()
- missing include
missing paren
use a define for the CA file.
need quotes
do not fail on EINVAL in delivery_filename as we may be delivering
to a descriptor that does not support fsync()
Merge branch 'master' into portable
- teach MTA how to verify a server certificate
- fix a crash caused by a missing NULL pointer assignation in lka
fix io issues