Fix and update languages codes for Czech and Chinese.
dxva: fix and rework video surface handling
dxva: let renderer control the render buffers
dxva: flush ffmpeg buffers if it holds any refs on close
renderer: rename/correct GetProcessorSize, processor is not exposed anymore
dxva: disable hq scalers for dxva rendering, it fails on NVdia. 3c31288b4708db2a2c9cc2dbd2b58de30f41290d
dxva: never try to open more than a single hw decoder on ati HD 2xxx and HD3xxx
DXVA-HD: return false if OpenProcessor fails
Merge pull request #5379 from ace20022/ces_zho

Fix and update languages codes for Czech and Chinese.
Merge pull request #5370 from FernetMenta/dxva

DXVA: fixes and rework
vaapi: flush ffmpeg buffers if it holds any refs on close
vaapi: drop unused member
renderer: bump number of buffers for vdpau and vaapi
[kodi] add splash with (TM)
Merge pull request #5391 from FernetMenta/vaapivdpau

Vaapivdpau: fix and optimization
[win32] fix detection of old XBMC install and remove XBMC regkeys
[win32] show message in installer that userdata was moved to new location
videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
videoplayer: update frametime, it might change due to fps detection