/*      ssl_set(key=nil, cert=nil, ca=nil, capath=nil, cipher=nil)   */
static VALUE ssl_set(int argc, VALUE* argv, VALUE obj)
{
    VALUE key, cert, ca, capath, cipher;
    char *s_key, *s_cert, *s_ca, *s_capath, *s_cipher;
    MYSQL* m = GetHandler(obj);
    rb_scan_args(argc, argv, "05", &key, &cert, &ca, &capath, &cipher);
    s_key = NILorSTRING(key);
    s_cert = NILorSTRING(cert);
    s_ca = NILorSTRING(ca);
    s_capath = NILorSTRING(capath);
    s_cipher = NILorSTRING(cipher);
    mysql_ssl_set(m, s_key, s_cert, s_ca, s_capath, s_cipher);
    return obj;
}