dns_message_gettempname
result = dns_message_gettempname(lookup->sendmsg, &soaname);
result = dns_message_gettempname(lookup->sendmsg, &lookup->name);
result = dns_message_gettempname(lookup->sendmsg,
dns_message_gettempname(dns_message_t *msg, dns_name_t **item);
ret = dns_message_gettempname(msg, &owner);