Log Message:
Update to dovecot-1.0rc24.

	* Dovecot now fails to load plugins that were compiled for different
	  Dovecot version, unless version_ignore=yes is set. This needs to be
	  explicitly set in plugins, so out-of-tree plugins won't have this
	  check by default.

	- pop3_lock_session=yes could cause deadlocks, and with maildir the
	  uidlist lock could have been overridden after 2 minutes causing
	  problems
	- PAM wasted CPU by calling a timeout function 1000x too often
	- Trash plugin was more or less broken with multiple namespaces and
	  with multiple trash mailboxes