Asterisk: Accepted Patch

First contribution to Asterisk (implemented together with Frank Haase):

For video calls, we would like to set the codecs in the dialplan using
SIP_CODEC. However, if SIP_CODEC is set, all codecs except the ONE set are disallowed and thus either audio or video is available.

Attached is a patch for 11.4 that allows SIP_CODEC to contain a list of codecs , e.g. "gsm,h264".

https://issues.asterisk.org/jira/browse/ASTERISK-21976

is accepted: https://reviewboard.asterisk.org/r/2728/

Thanks to Matt Jordan and Rusty Newton (both Digium) for their reviews.