ffmpeg: bump to 2.4
ffmpeg: adapt win32 dlls to major versions of 2.4
X11: ditch SDL for video and window events
X11: move xrandr events to WinEventsX11
X11: reset key repeat and key modifier on focus lost and gain
X11: use system key repeat rate instead of hardcoded one, taken from 58fd64b194e38b73b5f3132744bab35e994e7441
xrandr: remove method RestoreState
xrandr: observe orientation
xrandr: allow getting info for multiple screen's
xrandr: set screen on mode change command
xrandr: add turn on/off to wrapper
xrandr: add GetPreferredMode to wrapper
xrandr: support for multiple x screens
X11: fix multi-head setups
X11: remove all DefaultScreen and RootWindow macros
X11: remove all DefaultScreen and RootWindow macros (VideoRefClock)

Note this is on a separate display connection.
X11: use default screen parameters if no output connected
X11: do not overwrite user selected monitor with fallback
X11: multi-head improvements
X11: hook video reference clock in windowing