*/
static void usage(void)
{
    printf("PuTTY Secure Copy client\n");
    printf("%s\n", ver);
    printf("Usage: scp [options] [user@]host:source target\n");
    printf("       scp [options] source [source...] [user@]host:target\n");
    printf("       scp [options] -ls user@host:filespec\n");
    printf("Options:\n");
    printf("  -p        preserve file attributes\n");
    printf("  -q        quiet, don't show statistics\n");
    printf("  -r        copy directories recursively\n");
    printf("  -v        show verbose messages\n");
    printf("  -P port   connect to specified port\n");
    printf("  -pw passw login with specified password\n");