[Dovecot] v2.2.rc7 released

http://dovecot.org/releases/2.2/rc/dovecot-2.2.rc7.tar.gz http://dovecot.org/releases/2.2/rc/dovecot-2.2.rc7.tar.gz.sig

OK, still not quite v2.2.0, but now it's definitely very close. :)

* checkpasword: AUTH_PASSWORD environment is no longer set.
* Running dsync no longer triggers quota warnings.

+ dsync: Commit large transactions every 100 new messages, so if a
  large sync crashes it doesn't have to be restarted from the
  beginning.
- replicator: doveadm commands and user list export may have skipped
  some users.
- Various fixes to mailbox_list_index=yes