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

[bcr at FreeBSD.org]

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

State-Changed-From-To: open->closed
State-Changed-By: bcr
State-Changed-When: Sat Sep 22 11:11:12 UTC 2012
State-Changed-Why: 
Closed by submitters request. The change r39566 of 
books/handbook/jails/chapter.sgml provided sufficient 
warning to solve the issue.

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