#33 Support SRT

[Mr Scott Robinson]

Support for SRT would be incredibly awesome (https://github.com/Haivision/srt)

In the video broadcast world we frequently use SRT or RIST for outside broadcasts to "smoth" streams over the internet. Audio streams whilst smaller, could still benefit.

Liquidsoap can receive SRT and a sample "receiving" setup can be found at https://github.com/mbugeia/srt2hls