[Dovecot] v1.2.15 released

http://dovecot.org/releases/1.2/dovecot-1.2.15.tar.gz http://dovecot.org/releases/1.2/dovecot-1.2.15.tar.gz.sig

See the "ACL handling bugs" message for more details about the ACL merging bug.

* acl: Fixed the logic of merging multiple ACL entries. Now it works as
  documented, while previously it could have done slightly different
  things depending on the order of the entries.

* acl: Don't give admin rights to all owner mailboxes. This was
  originally done to make sure that mailbox owner couldn't accidentally
  remove their own admin rights. But this is already prevented by
  SETACL command, so it's not necessary. Also sysadmin may have
  intentionally removed some admin rights from some mailboxes
  (especially when using symlinked shared mailboxes).

- Maildir: Fixed potential "Duplicate file entry" in dovecot-uidlist
  file errors.
- Maildir: Avoid unnecessary uidlist recreation during mail delivery.
- imap: When SELECT fails, it didn't close the previous mailbox.
- Dovecot master process could have died if it got SIGCHLD signals
  very rapidly while it was trying to log. This could have happened
  for example if a lot of imap/pop3 sessions disconnected at the exact
  same time.