[giow] (3) Rewrite the link following stuff to better match reality.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=18854
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@7794 340c8d12-0b0e-0410-8428-c7bf67bfef74