[giow] (3) Make appcache requests have no referrer, since it's not clear what referrer to use.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=17687
Affected topics: HTML, Offline Web Applications

git-svn-id: https://svn.whatwg.org/webapps@8791 340c8d12-0b0e-0410-8428-c7bf67bfef74
[giow] (0) Suggest that browsers filter the list='' suggestions if there's more than 4 to 7.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=9785
Affected topics: HTML

git-svn-id: https://svn.whatwg.org/webapps@8792 340c8d12-0b0e-0410-8428-c7bf67bfef74
Merge remote branch 'origin/master' into whatwg