feat: support forwarded headers for websocket

[jclab-joseph]

Fixes #1437
Also ipfs/kubo#8193

Avoid connection limit issues when there is an ipfs websocket behind a proxy.
Kubo Log:

DEBUG   upgrader        upgrader/listener.go:99 resource manager blocked accept of new connection       {"error": "connections per ip limit exceeded for /ip4/10.42.111.111/tcp/38108/ws"}

[MarcoPolo]

I like the general idea here. I think we need to be careful not to open up security vulnerabilities here.