Do not scroll list label if <scroll>false</scroll>
webserver: cosmetic refactoring
webserver: add support for If-Unmodified-Since HTTP header
webserver: add Cache-Control HTTP header to cacheable responses
webserver: handle Cache-Control: no-cache and Pragma: no-cache
webserver: use defines for HTTP header fields and values
webserver: silence warning
webserver: refactor IsAuthenticated()
BaseRender: Allow 1px wrong in aspect ratio to not do completeley refit the image
dvdplayer: make sure overlay container is cleared when player stops
 DXVA: add HD5xxx to ati work-around, only capable of opening a single time
[Confluence] remove addon ratings
Merge pull request #5985 from fritsch/master-ports

Pick Helix fixes to master: overlays and dxva for ati graphics
FIX: [aml;pivos] Fix 1080 on MX
Merge pull request #5922 from fritsch/aspect

BaseRender: Allow 1px wrong in aspect ratio to not do completeley refit the image
Merge pull request #5987 from koying/fixaml1080
Merge pull request #5573 from Montellese/webserver_caching

webserver: improved caching control
[art] fix missing container art for album paths
[Fix] Fix a memory leak in Setting.cpp.
[keyboard] only use English names for layouts