config: add option -no-cache and -response-mode for domain-rules and add some test cases.

test/client.h

@@ -90,6 +90,7 @@ class Client
 	bool ParserRecord(const std::string &record_str, std::vector<DNSRecord> &record);
 	std::string result_;
 	int answer_num_{0};
+	int records_authority_num_{0};
 	std::string status_;
 	std::string server_;
 	int query_time_{0};