Call WG code directly when bridging peers instead of creating a UDP connection

[julsemaan]

Currently we create a UDP connection to the local WG server when bridging STUN peers or to bridge the public socket with the local WG server. Instead of that, we should try to call the WG server handler directly and capture the response (if any) to send it back to the client so that we reduce the amount of sockets that are consumed by the daemon