docs/172784: Default username and password not documented

[eadler at FreeBSD.org]

Old Synopsis: Username Password
New Synopsis: Default username and password not documented

Class-Changed-From-To: sw-bug->doc-bug
Class-Changed-By: eadler
Class-Changed-When: Tue Oct 16 14:39:32 UTC 2012
Class-Changed-Why: 
root is the username. no password.

I'm leaving this issue report open so that someone does see it and document it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=172784