[cgiowt] (1) innerHTML on template contents works like outside templates, when it comes to forms.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24017
Affected topics: HTML Syntax and Parsing

git-svn-id: http://svn.whatwg.org/webapps@8337 340c8d12-0b0e-0410-8428-c7bf67bfef74