[e] (0) Reference RFC4337 (MIME Type Registration for MPEG-4, video/mp4).
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=26421
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@8749 340c8d12-0b0e-0410-8428-c7bf67bfef74