Fix predefined DNS server

dns/transport/predefined.go

@@ -74,6 +74,7 @@ func (t *PredefinedTransport) Exchange(ctx context.Context, message *mDNS.Msg) (
 			}() {
 				copyAnswer := *response.answer
 				copyAnswer.Id = message.Id
+				copyAnswer.Question = message.Question
 				return &copyAnswer, nil
 			}
 		}

option/dns_record.go

@@ -95,8 +95,11 @@ func (o DNSResponseOptions) Build() ([]dns.Question, *dns.Msg, error) {
 	}
 	return questions, &dns.Msg{
 		MsgHdr: dns.MsgHdr{
-			Response: true,
-			Rcode:    o.RCode.Build(),
+			Response:           true,
+			Rcode:              o.RCode.Build(),
+			Authoritative:      true,
+			RecursionDesired:   true,
+			RecursionAvailable: true,
 		},
 		Answer: common.Map(o.Answer, DNSRecordOptions.build),
 		Ns:     common.Map(o.Ns, DNSRecordOptions.build),