1.20.0: direct connections over UDP and IPv6, server settings and admin console, troubleshooting for per-IP limits and released IDs, upgrade note on key files; allow-websocket can't be pushed by a strategy
1.17.0: WebRTC connections page (turning it on, web client, STUN/TURN and coturn, troubleshooting); WebRTC in the web client, strategies, settings and troubleshooting pages