[New Port Request] libdatachannel

[Nemirtingas]

Library name: libdatachannel

Library description:
libdatachannel is a standalone implementation of WebRTC Data Channels and WebSockets in C++17 with C bindings for POSIX platforms (including GNU/Linux, Android, and Apple macOS) and Microsoft Windows

Licensed under LGPLv2.

Source repository URL: https://github.com/paullouisageneau/libdatachannel

Project homepage (if different from the source repository):

Anything else that is useful to know when adding (such as optional features the library may have that should be included):
Features:
For ICE implementation: use either libjuice or libnice : libjuice as default
For SSL: openssl or GNUTls : openssl as default

Extra dependencies:
nlohmann::json
plog

This library addition would be awesome because we don't have a lot of WebRTC C/C++ libraries out there that are easy to build.
This one even have CMake support.

[LilyWangL]

This issue will be fixed in PR #13704.