dns_alloc_msg
struct dns_msg* dns_alloc_msg(struct sldns_buffer* pkt, struct msg_parse* msg,
iq->response = dns_alloc_msg(pkt, prs, qstate->region);
qstate->return_msg = dns_alloc_msg(buf, prs, qstate->region);
struct dns_msg* dns_alloc_msg(struct sldns_buffer* pkt, struct msg_parse* msg,
iq->response = dns_alloc_msg(pkt, prs, qstate->region);