* commit 'ddea22a684611c1fec9d8b5c70d835e983a9252e':
avconv: Use codec hardware config to configure hwaccels
lavc: Mark all AVHWAccel structures as const
lavc: Delete all fake hwaccels
lavc: Remove register mechanism for hwaccels
lavc: Deprecate av_hwaccel_next() and av_register_hwaccel()
lavc: Use hardware config information in ff_get_format()
webp: Fix alpha initialisation
lavc: Add hardware config metadata for decoders supporting hardware output
lavc: Add codec metadata to indicate hardware support