add webrtc-rs into docs

Author: Rain Liu

README.md

@@ -17,6 +17,7 @@ The libraries that currently have a Client and Server implementation are:
  - [Pion](https://github.com/pion/webrtc): Pure Go implementation of the WebRTC API.
  - [SIPSorcery](https://github.com/sipsorcery-org/sipsorcery): A WebRTC, SIP and VoIP library for C# and .NET Core. Designed for real-time communications apps.
  - [werift-webrtc](https://github.com/shinyoshiaki/werift-webrtc): WebRTC Implementation for TypeScript (Node.js)
+ - [webrtc-rs](https://github.com/webrtc-rs/webrtc): A pure Rust implementation of WebRTC stack. Rewrite [Pion](https://github.com/pion/webrtc) WebRTC stack in Rust.
 
 Additional libraries/applications that currently have a Server implementation are:
 

doc/PeerConnectionTestSpecification.md

@@ -16,6 +16,8 @@ The descriptions in the following sections outline how the `Server Peer` and `Cl
   - C++: [libdatachannel Test Client](../libdatachannel/client.cpp)
   - TypeScript: [werift Test Server](../werift/server.ts)
   - TypeScript: [werift Test Client](../werift/client.ts)
+  - Rust: [webrtc-rs Test Server](../webrtc-rs/server/src/main.rs)
+  - Rust: [webrtc-rs Test Client](../webrtc-rs/client/src/main.rs)
 
 ## Signaling