dyndns_put_nlong
*ptr = dyndns_put_nlong(*ptr, ttl);
*ptr = dyndns_put_nlong(*ptr, 0);
*ptr = dyndns_put_nlong(*ptr, tp.tv_sec); /* inception */
*ptr = dyndns_put_nlong(*ptr, tp.tv_sec + key_expire);
*ptr = dyndns_put_nlong(*ptr, 0);
*ptr = dyndns_put_nlong(*ptr, signtime); /* sign time */
*ptr = dyndns_put_nlong(*ptr, fudge); /* fudge time */