dns_message_gettemprdatalist
result = dns_message_gettemprdatalist(lookup->sendmsg, &rdatalist);
dns_message_gettemprdatalist(dns_message_t *msg, dns_rdatalist_t **item);
result = dns_message_gettemprdatalist(msg, &list);
result = dns_message_gettemprdatalist(message, &rdatalist);
ret = dns_message_gettemprdatalist(msg, &datalist);