DNS_MESSAGEFLAG_RD
if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0)
(msg->flags & DNS_MESSAGEFLAG_RD) != 0 &&
lookup->sendmsg->flags |= DNS_MESSAGEFLAG_RD;
if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0) {
#define DNS_MESSAGE_REPLYPRESERVE (DNS_MESSAGEFLAG_RD|DNS_MESSAGEFLAG_CD)