Trailing slash in ws_url causes authentication failures

[davidzhao]

Reported in slack

With livekit-server 1.4.2 and Ingress 0.9.0, when I tying to send some test rtmp data to ingress, I get following error in logs:

ERROR   ingress service/handler.go:120  ingress failed  {"nodeID": "NE_Caea23Ygkz3s", "ingressID": "IN_AgLrhaGk9jhP", "ingressID": "IN_AgLrhaGk9jhP", "error": "unauthorized: no permissions to access the room"}

This happens if ws_url has a trailing slash like wss://livekit.example.com/. Removing the trailing slash appears to fix the auth error above.