docs/174251: [PATCH] Propose to add in example for adding users to wheel group

[eadler at FreeBSD.org]

Synopsis: [PATCH] Propose to add in example for adding users to wheel group

Responsible-Changed-From-To: freebsd-doc->eadler
Responsible-Changed-By: eadler
Responsible-Changed-When: Fri Dec 7 04:35:36 UTC 2012
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=174251