Warn when Port addresses have no effect
Following up #13953 (moved), we could also warn: "Setting Listen Address %s on the %sNoListen port %d has no effect. Tor uses Address for IPv4 and the first advertised port for IPv6.", address_string, ip_version == 6 ? "secondary " : "", port_number
We would warn on every IPv4 NoListen port, and the second and subsequent IPv6 NoListen ports.
I think this could be useful, but it could also be too verbose.