docs/168929: bad links in commercial section

[issyl0 at FreeBSD.org]

Synopsis: bad links in commercial section

Responsible-Changed-From-To: freebsd-doc->gavin 
Responsible-Changed-By: issyl0
Responsible-Changed-When: Mon Jun 11 19:34:13 UTC 2012
Responsible-Changed-Why: 
Assign this PR to gavin as he has some similar changes outstanding
from Google Code-In that could potentially be duplicates of, or similar to, these.

http://www.freebsd.org/cgi/query-pr.cgi?pr=168929