docs/173405: Undocumented feature of ifconfig (reading configuration from rc.conf)

[wblock at FreeBSD.org]

Synopsis: Undocumented feature of ifconfig (reading configuration from rc.conf)

Responsible-Changed-From-To: freebsd-doc->wblock
Responsible-Changed-By: wblock
Responsible-Changed-When: Wed Nov 7 15:11:21 UTC 2012
Responsible-Changed-Why: 
Take.

http://www.freebsd.org/cgi/query-pr.cgi?pr=173405