htsp server: review channel access verification, fixes #2505
fix libav muxer to keep sync with the internal H264 packet changes
doc: tags - improve private field documetation
transcode: h264 - merge the meta data to output packet
transcoding: fix the resample output buffer allocation
mkmux; Fix the cluster start (keyframe)
httpc: accept only LF (instead CR/LF) for HTTP headers to be tolerant according RFC
profile: fix sharing (missing STOP messages)
support: updated list of apt dist builds
mkmux: always initialize component index in track and use only disabled (remove enabled) variable