[CFR][ZFS] Show "previous device location" for removed vdevs

[Ollivier Robert]

According to Pawel Jakub Dawidek:
> > reports the device GUID and a "device was at" message as a user aid.  This
> > patch provides the same behavior when a device is removed post zpool
> > mount/import.
> 
> Sounds good.

So have we officially forked ZFS on freebsd or not?

-- 
Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto at keltia.freenix.fr
In memoriam to Ondine : http://ondine.keltia.net/