Removes specific support for all hwaccels supported by the generic code (DXVA2, D3D11VA, NVDEC, VAAPI and VDPAU).
* commit 'c95169f0ec68bdeeabc5fde8aa4076f406242524': build: Move cli tool sources to a separate subdirectory Merged-by: James Almer <jamrial@gmail.com>