tsh doesn't accept higher port numbers via -p

[kontsevoy]

Problem

tsh CLI parsing uses Int16 to parse port numbers. The highest port number can be 65535 but int16 only goes to 32767. That is why we need int32 to reach higher port numbers than 32767. In certain cases this can be handy when you want to run the node client on a random port.

[kontsevoy]

This PR fixes it: #1569