Update frp

README.md

@@ -38,7 +38,7 @@ easy tool to use, and is targeted at non-developers.
 
 # Open source (at least with a reasonably permissive license)
 
-* [frp](https://github.com/fatedier/frp) [![frp github stars badge](https://img.shields.io/github/stars/fatedier/frp?style=flat)](https://github.com/fatedier/frp/stargazers) - Seems to be a pretty comprehensive open alternative to ngrok.
+* [frp](https://github.com/fatedier/frp) [![frp github stars badge](https://img.shields.io/github/stars/fatedier/frp?style=flat)](https://github.com/fatedier/frp/stargazers) - Comprehensive open alternative to ngrok. Supports UDP, and has a P2P mode. I believe it uses a custom TCP protocol for multiplexing, which can either run over a single TCP connection or a connection pool.
 * [ngrok 1.0](https://github.com/inconshreveable/ngrok) [![ngrok 1.0 github stars badge](https://img.shields.io/github/stars/inconshreveable/ngrok?style=flat)](https://github.com/inconshreveable/ngrok/stargazers) - Original version of ngrok. No longer developed in favor of the commercial 2.0 version.
 * [localtunnel](https://github.com/localtunnel) [![localtunnel github stars badge](https://img.shields.io/github/stars/localtunnel/localtunnel?style=flat)](https://github.com/localtunnel/localtunnel/stargazers) - Written in node. Popular suggestion.
 * [ZeroTier](https://www.zerotier.com/) - [![zerotier github stars badge](https://img.shields.io/github/stars/zerotier/ZeroTierOne?style=flat)](https://github.com/zerotier/ZeroTierOne/stargazers) Layer 2 overlay network.