Merge remote-tracking branch 'qatar/master'

* qatar/master:
  libopus: Remap channels using libopus' internal remapping.
  Opus decoder using libopus
  avcodec: document the use of AVCodecContext.delay for audio decoding
  vc1dec: add flush function for WMV9 and VC-1 decoders
  http: Increase buffer sizes to cope with longer URIs
  nutenc: const correctness for ff_put_v_trace/put_s_trace function arguments
  h264_refs: Fix debug tprintf argument types
  golomb: const correctness for get_ue()/get_se() function arguments
  get_bits: const correctness for get_bits_trace()/get_xbits_trace() arguments

Conflicts:
	Changelog
	libavcodec/Makefile
	libavcodec/version.h
	libavformat/http.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>