[reSIProcate] reCon: using GStreamer with WebRTC module instead of sipXtapi

[Daniel Pocock]

I created a high-level bug for this possible integration:

https://www.resiprocate.org/bugzilla/show_bug.cgi?id=145

They recently added a WebRTC module, here is a walkthrough of the C API:
http://blog.nirbheek.in/2018/02/gstreamer-webrtc.html

and here are complete examples in the repository:
https://gitlab.freedesktop.org/gstreamer/gst-examples/-/blob/master/webrtc/sendrecv/gst/webrtc-sendrecv.c

with the corresponding HTML and JavaScript:
https://gitlab.freedesktop.org/gstreamer/gst-examples/-/tree/master/webrtc/sendrecv/js