docs/160447: [handbook] Developer's Handbook contains some outdated information

[issyl0 at FreeBSD.org]

Synopsis: [handbook] Developer's Handbook contains some outdated information

Responsible-Changed-From-To: freebsd-doc->issyl0 
Responsible-Changed-By: issyl0
Responsible-Changed-When: Sun Jun 24 17:17:35 UTC 2012
Responsible-Changed-Why: 
Take this PR.

http://www.freebsd.org/cgi/query-pr.cgi?pr=160447