[Dovecot] v1.2.7 released

http://dovecot.org/releases/1.2/dovecot-1.2.7.tar.gz http://dovecot.org/releases/1.2/dovecot-1.2.7.tar.gz.sig

* IMAP: IDLE now sends "Still here" notifications to same user's
  connections at the same time. This hopefully reduces power usage
  of some mobile clients that use multiple IDLEing connections.
* IMAP: If imap_capability is set, show it in the login banner.

+ IMAP: Implemented SORT=DISPLAY extension.
- Login process creation could have sometimes failed with epoll_ctl()
  errors or without epoll probably some other strange things could
  have happened.
- Maildir: Fixed some performance issues
- Maildir: Fixed crash when using a lot of keywords.
- Several fixes to QRESYNC extension and modseq handling
- mbox: Make sure failed saves get rolled back with NFS.
- dbox: Several fixes.