docs/137762: [handbook] [patch] proposed: mention "make delete-old" in sec 24.7 Rebuilding World

[bcr at FreeBSD.org]

Synopsis: [handbook] [patch] proposed: mention "make delete-old" in sec 24.7 Rebuilding World

Responsible-Changed-From-To: freebsd-doc->bcr
Responsible-Changed-By: bcr
Responsible-Changed-When: Fri Nov 5 15:09:03 UTC 2010
Responsible-Changed-Why: 
Let me finish up the work on this PR. :)

http://www.freebsd.org/cgi/query-pr.cgi?pr=137762