
	-a	Remove all unreferenced files (even very new ones).
	-d	Remove empty directories from multi-part tree.
	-f	Remove time-out messages from received files directory.
	-l	Remove lock files.
	-m	Don't send mail about inconsistencies.
	-r	Try routing old messages in _pending again.
	-s	Silently.
	-t	Remove timed-out messages from _trace directory.
	-w	Warn about inconsistencies.
