CDateTime: extend SetFromW3CDate() and add GetAsW3CDate(), GetAsW3CDateTime() and SetFromW3CDateTime()
upnp: fix serialization/deserialization of datetime properties
move ISliderCallback into its own header file
guilib: don't abuse and redeclare SPIN_CONTROL_TYPE_FOO
CGUISliderControl: fix SetIntValue() and SetFloatValue()
upnp: add some potentially useful logging to CUPnPPlayer::PlayFile()
Merge pull request #4594 from FernetMenta/paplayer

paplayer: proper handling of non seekable streams
Merge pull request #4607 from koying/fixdroidstoragecrash

FIX: [droid] crash when stat'ing /mnt/secure/asec on some devices (fixes #15148)
[osx] fix make build on osx
[tests] fix CharsetConverter.utf8To_UTF32LE test on osx
[tests] fix HttpHeader test
FIX: [linux] fix & optimize input device checking
Merge pull request #4614 from Montellese/upnp_player_logging

upnp: add some potentially useful logging to CUPnPPlayer::PlayFile()
[depends] move ffmpeg to unified deps
[configure] remove internal ffmpeg
remove ffmpeg from tree
ffmpeg: remove dll wrappers
add ffmpeg lock manager
todo: refactor to own file
ffmpeg: move callbacks into separate file
remove ffmpeg dlls from generated headers
not removing win32 as this might still be needed?