Log Message:
Update to Dovecot 1.1.9.  From the release announcement mail:

Lots of small dbox fixes, hopefully migrations from Maildir are now working
correctly.

+ Sending SIGUSR2 to dovecot-auth now also logs statistics about cache inserts.
  This could help figuring out auth cache size.
+ deliver: Added rejection_subject setting, which is used for rejected mails.
+ pop3: Prevent clients from looping forever trying to fetch an expunged
  message.
+ If login process crashes, log the IP address that (maybe) caused it.
+ If core dump limit is 0, add "core dumps disabled" to startup log line.
+ Log better messages for "Permission denied" errors
- mbox: Fixed assert-crash with pop3_lock_session=yes
- dbox: Fixes to handling maildir-converted files.
- Auth cache wasn't working correctly for all fields (e.g. allow_nets) with
  blocking passdbs (e.g. mysql).
- pgsql: Handle reconnecting to server without failing auth lookups.
- Berkeley DB memory/resource leak fixes.
- maildir: Fixes to handling over 26 keywords.