Change: Less sensitive info in Authcache Footer JSON [#805900], [#984066]

Fix: Tabs should render correctly. Removed 'tab_hide' functionality (too aggressive and can't handle modules like Node Access). [#694438], [#825356]

Fix: Saving admin nonhtml settings [#766944] by allain
Fix: [#758380]
Fix: Allow both CacheRouter and Memcache module to be used [#901248] by sdelbosc