Added deliver_log(), which is used to log the mail delivery status instead of handling it separately all over.
Added deliver_log(), which is used to log the mail delivery status instead
of handling it separately all over.

--HG--
branch : HEAD

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot