//usage: "[-cb] [-p MIN_PORT] [-P MAX_PORT] [-t TIMEOUT] [-T MIN_RTT] HOST"
//usage:#define pscan_full_usage "\n\n"
//usage: "Scan a host, print all open ports\n"
//usage: "[-cb] [-p MIN_PORT] [-P MAX_PORT] [-t TIMEOUT] [-T MIN_RTT] HOST"
//usage:#define pscan_full_usage "\n\n"
//usage: "Scan a host, print all open ports\n"