Build the public announce address for a relay sitting behind NAT. Peers use this address to dial the relay. The relay itself still binds to listenAddr.
listenAddr
The relay's local listen address in "host:port" format.
"host:port"
The relay's externally-reachable IP address.
Build the public announce address for a relay sitting behind NAT. Peers use this address to dial the relay. The relay itself still binds to
listenAddr.