dovecot updated to 2.1.1

- acl plugin + autocreated mailboxes crashed when listing mailboxes
- doveadm force-resync: Don't skip autocreated mailboxes (especially
  INBOX).
- If process runs out of fds, stop listening for new connections only
  temporarily, not permanently (avoids hangs with process_limit=1
  services)
- auth: passdb imap crashed for non-login authentication (e.g. smtp).

.gitignore

@@ -40,3 +40,5 @@ pigeonhole-snap0592366457df.tar.bz2
 /dovecot-2.1-pigeonhole-b2a456e15ed5.tar.bz2
 /dovecot-2.1.0.tar.gz
 /dovecot-2.1-pigeonhole-0.3.0.tar.gz
+/dovecot-2.1.1.tar.gz
+/pigeonhole-snap67950c9d3675.tar.bz2