wsgidav
wsgidav.dc
wsgidav.mw
wsgidav.prop_man
wsgidav.lock_man
wsgidav.samples
wsgidav.server
Return lock_dict, or None, if not found or invalid.
Side effect: if lock is expired, it will be purged and None is returned.
name of lock attribute that will be returned instead of a dictionary.