[Dovecot] v1.1.5 release candidate

http://dovecot.org/tmp/dovecot-1.1.5-rc.tar.gz

I thought about making v1.1.5 release today, but then thought maybe I'll make an RC instead since I did quite a lot of changes this weekend. So please try and see if there are any bugs left. I'll make the final release in a couple of days.

The largest changes since v1.1.4:

+ Maildir/dbox: Try harder to assign unique UIDVALIDITY values to
  mailboxes to avoid potential problems when recreating or renaming
  mailboxes. The UIDVALIDITY is tracked using dovecot-uidvalidity*
  files in the mail root directory.
+ Many logging improvements
- In some conditions Dovecot could have stopped using existing cache
  file and never used it again until it was deleted.
- pop3 + Maildir: Make sure virtual sizes are always written to
  dovecot-uidlist. This way if the indexes are lost Dovecot will never
  do a huge amount of work to recalculate them.
- mbox: Fixed listing mailboxes in namespaces with prefix beginning
  with '~' or '/' (i.e. UW-IMAP compatibility namespaces didn't work).
- dict quota: Don't crash when recalculating quota (when quota warnings
  enabled).
- Fixes to handling "out of disk space/quota" failures.
- Fixed compiling with OpenBSD