implement priority check

gframe/duelclient.cpp

@@ -4393,11 +4393,16 @@ bool DuelClient::LookupSRV(char *hostname, HostResult* result) {
   ns_initparse(answer, status, &nsMsg);
 	bool found = false;
 	std::vector<RetrivedSRVRecord> records;
+	unsigned short minPriority = 0xffff;
 	for(int i = 0; i < ns_msg_count(nsMsg, ns_s_an); i++) {
 		auto record = RetrivedSRVRecord(nsMsg, i);
-		if(!record.valid)
+		if(!record.valid || record.priority > minPriority)
 			continue;
 		for (int j = 0; j < record.weight; ++j) {
+			if(record.priority < minPriority) {
+				records.clear();
+				minPriority = record.priority;
+			}
 			records.push_back(record);
 		}
 	}