Add bifrost

Bifrost is intended to be a tool for securely tunneling protocols over
unreliable networks.

I placed it under the more advanced tools section since it also is capable of
being used as a library for building apps with Go and is not strictly about
tunneling but rather building dynamically configurable networked Go apps.

Signed-off-by: Christian Stewart <christian@aperture.us>

README.md

@@ -122,6 +122,7 @@ A lot of new tools have been developed since the list started, and many tools ha
 * [Ngrok-operator](https://github.com/zufardhiyaulhaq/ngrok-operator) [![ngrok operator github stars badge](https://img.shields.io/github/stars/zufardhiyaulhaq/ngrok-operator?style=flat)](https://github.com/zufardhiyaulhaq/ngrok-operator/stargazers) - Ngrok but integrated with Kubernetes, allows developers on private kubernetes to easily access their services via Ngrok.
 * [chisel-operator](https://github.com/FyraLabs/chisel-operator/) [![chisel operator github stars badge](https://img.shields.io/github/stars/FyraLabs/chisel-operator?style=flat)](https://github.com/FyraLabs/chisel-operator/stargazers) - Kubernetes integration for Chisel. Similar functionality to inlets. MIT License. Written in Rust.
 * [frp-operator](https://github.com/zufardhiyaulhaq/frp-operator) [![frp-operator github stars badge](https://img.shields.io/github/stars/zufardhiyaulhaq/frp-operator?style=flat)](https://github.com/zufardhiyaulhaq/frp-operator/stargazers) - Kubernetes integration for [FRP](https://github.com/fatedier/frp). MIT License. Written in Go.
+* [bifrost](https://github.com/aperturerobotics/bifrost) [![bifrost github stars badge](https://img.shields.io/github/stars/aperturerobotics/bifrost?style=flat)](https://github.com/aperturerobotics/bifrost/stargazers) - Bifrost is a peer-to-peer communications engine with pluggable transports. It supports dynamic configuration of transports, listeners, forwarding rules, and can tunnel other protocols over WebRTC and Quic. Apache 2.0 License. Written in Go.
 
 
 # Reference