Just noticed this option is not yet documented! I've filed a report for udev guys to add mention this in the man page and describe it a bit since it's quite important and yet it's hidden functionality if not documented:
https://bugzilla.redhat.com/show_bug.cgi?id=1247210 -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
