gmirror rebuild does not accept full path to provider

[Miroslav Lachman]

I am not so experienced user of gmirror, but as I read man pages and 
some online HowTo, I think this is a bug.

# gmirror rebuild -v gm0 /dev/ad5
No such provider: /dev/ad5
# gmirror rebuild -v gm0 ad5
GEOM_MIRROR: Device gm0: provider ad5 disconnected.
GEOM_MIRROR: Device gm0: provider ad5 detected.
GEOM_MIRROR: Device gm0: rebuilding provider ad5.
Done.

Is it expected?

Other commands (gmirror label, gmirror insert, etc.) accept full path.

Miroslav Lachman