[giow] (3) Attempt to mitigate the injection elevation attack on appcache, and describe the attack in detail
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=25699
Affected topics: Offline Web Applications, Security

git-svn-id: http://svn.whatwg.org/webapps@8739 340c8d12-0b0e-0410-8428-c7bf67bfef74
Merge remote branch 'origin/master' into whatwg