printf("  -L listen-port:host:port   Forward local port to " "remote address\n"); printf("  -R listen-port:host:port   Forward remote port to" " local address\n");
static void usage(void){    printf("PuTTY Link: command-line connection utility\n");    printf("%s\n", ver);    printf("Usage: plink [options] [user@]host [command]\n");    printf("       (\"host\" can also be a PuTTY saved session name)\n");    printf("Options:\n");    printf("  -v        show verbose messages\n");    printf("  -ssh      force use of ssh protocol\n");    printf("  -P port   connect to specified port\n");    printf("  -pw passw login with specified password\n");    printf("  -m file   read remote command(s) from file\n");    exit(1);}