Liquidsoap 1.3.7

Bugfix release which address a particularly annoying timeout issue with external processes. Code change is bigger than usual for a bugfix but call for early testing bring hope that the fixes should be correct and without regressions.

Changed:

• Reimplemented open_process_full to get a hand on pid and finer-grained closing workflow (#703)

• Better log message when request download times out (#708)

• Drop log.level for ffmpeg messages to 5

Fixed:

• Timeout when executing external processes (#691, #736, #726, #708)

• Set buffering only when frame is partial in time_wrap.ml. Makes it work with crossfade transitions (#695)

• Changed Icy-MetaData:1 to Icy-MetaData: 1 in HTTP source headers. Fixes some shoutcast implementations (#727)

• Fixed deadlock in input.http source status command (#367)