SocketAddress parses port 80 as 0

[ChALkeR]

https://github.com/nodejs/node/blob/HEAD/lib/internal/socketaddress.js#L159

> net.SocketAddress.parse('127.0.0.1:81').port
81
> net.SocketAddress.parse('127.0.0.1:80').port
0

At least, this is very undocumented

Doc: https://nodejs.org/api/net.html#socketaddressparseinput