Bug#791869: lvm2: updating src:lvm2 from 2.02.111-2.2 to 2.02.122-1 breaks booting, mounting LVs other than / fails

[Peter Rajnoha]

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