docs/156853: [patch] Update docs: jail(8) security issues with world-readable jail root

[crees at FreeBSD.org]

Synopsis: [patch] Update docs: jail(8) security issues with world-readable jail root

Responsible-Changed-From-To: freebsd-doc->freebsd-jail
Responsible-Changed-By: crees
Responsible-Changed-When: Fri Jul 20 09:18:56 UTC 2012
Responsible-Changed-Why: 
What do you guys think of it?

http://www.freebsd.org/cgi/query-pr.cgi?pr=156853