an invalid flag causes the program to print the same usage as --help
--version now prints the actual version
I renamed --tcplisten and --tcpdial to their original --listen and --dial, since they're not limited to TCP sockets, and since there's no need to try to match wasmtime (which supports --tcplisten)
This PR makes the following improvements:
--help--versionnow prints the actual version--tcplistenand--tcpdialto their original--listenand--dial, since they're not limited to TCP sockets, and since there's no need to try to match wasmtime (which supports--tcplisten)