linux: use CLOCK_MONOTONIC_RAW as this is not subject to NTP
VDPAU: improve error handling
Merge pull request #4635 from FernetMenta/linux

linux: use CLOCK_MONOTONIC_RAW as this is not subject to NTP
Merge pull request #4638 from FernetMenta/vdpau2

VDPAU: improve error handling (ffmpeg 2.2)
videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
videoplayer: some rework and documentation
renderer: bump buffers to 5
videoplayer: update frametime, it might change due to fps detection
videoplayer: give streams with invalid fps a chance for fps detection
dvdplayer: allow rewinding at end of stream, do a seek after rewind
dvdplayer: observe pts counter overflow
dvdplayer: avoid short screen flicker caused by unnecessary reconfigure of renderer
vdpau: advanced settings for auto deinterlacing
player: fix rewind
OMXPlayer: some caching fixes for pvr
fix incorrect display of fps when dr kicks in
renderer: allow some lateness within vblank interval
ActiveAE: slightly reduce buffer size
Revert "vdpau: comment some features that will be added later"

This reverts commit e00b4f65864d623ab4d2e9e5c06db138e661f1cf.