[giow] (3) Fix a regression added in r8001 where </br foo> would act like <br foo> instead of like <br>.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24233
Affected topics: HTML Syntax and Parsing

git-svn-id: http://svn.whatwg.org/webapps@8403 340c8d12-0b0e-0410-8428-c7bf67bfef74