* commit '4d330da0':
  os_support: Use HAVE_UWP instead of manually checking WINAPI_FAMILY
  d3d11va: Check WINAPI_FAMILY instead of HAVE_LOADLIBRARY
  lavf: Remove codec_tag from dashenc and smoothstreamingenc
  hevc: Add support for alternative transfer characterics SEI
Merged-by: James Almer <jamrial@gmail.com>