Actix Web WebRTC example

What would it take to implement WebRTC in Rust?

[WebRTC Glossary](https://webrtcglossary.com/)
https://www.reddit.com/r/rust/comments/gtntsf/miotokio_and_sctp_story/

### related code
* [Actix Web examples](https://github.com/actix/examples)
* (old) [webrtc-demo-server](https://github.com/simmons/webrtc-demo-server)