v2.2.23 released

http://dovecot.org/releases/2.2/dovecot-2.2.23.tar.gz http://dovecot.org/releases/2.2/dovecot-2.2.23.tar.gz.sig

This is a bugfix-only release with various important fixes on top of v2.2.22.

• Various fixes to doveadm. Especially running commands via doveadm-server was broken.
• director: Fixed user weakness getting stuck in some situations
• director: Fixed a situation where directors keep re-sending different states to each others and never becoming synced.
• director: Fixed assert-crash related to a slow "user killed" reply
• Fixed assert-crash related to istream-concat, which could have been triggered at least by a Sieve script.