[Dovecot] v1.1.16 released

http://dovecot.org/releases/1.1/dovecot-1.1.16.tar.gz http://dovecot.org/releases/1.1/dovecot-1.1.16.tar.gz.sig

Fixes a couple of bugs in v1.1.15's changes. Hopefully the last v1.1 release before v1.2.0.

- v1.1.15 could have crashed if mailbox-closing command was pipelined
  after a mailbox-accessing command.
- v1.1.15's zlib plugin may have caused crashes when fetching
  INTERNALDATE.
- Maildir: If messages had been deleted externally from new/ directory
  and mailbox was opened with EXAMINE, Dovecot didn't immediately
  notice that the messages were deleted.
- If message body started with a space, some operations could have
  assert-crashed.