[e] (0) The quirky class/id selector matching case logic moved to selectors
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=23781
Affected topics: CSS, HTML

git-svn-id: http://svn.whatwg.org/webapps@8610 340c8d12-0b0e-0410-8428-c7bf67bfef74