HTML5 checking with html5lib: Make sure it can handle form tags and empty input tags.
http://bugs.activestate.com/show_bug.cgi?id=98689
Implicit r=marky

(integrated from komodo (trunk) change 81654 by ericp)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13534 b87d16e7-d29f-4ee1-b5ec-817d645d335f