Added query rule to route 'SELECT @rpl_semi_sync_slave=?' and 'SET @r…

…pl_semi_sync_slave=1' queries to writer HG and disable multiplexing.

test/tap/tests/test_binlog_fast_forward-t.cpp

@@ -109,6 +109,9 @@ int setup_replication(int server_id, bool frontend_ssl, bool backend_ssl, std::v
 	MYSQL * mysql = mysql_init(NULL);
 
 	std::vector<std::string> admin_queries = {};
+	admin_queries.push_back("INSERT INTO mysql_query_rules (rule_id,active,match_digest,destination_hostgroup,multiplex,apply) VALUES\
+		(-1,1,'^(SELECT @rpl_semi_sync_slave=\\?.*|SET @rpl_semi_sync_slave=\\?.*)$',0,0,1)");
+	admin_queries.push_back("LOAD MYSQL QUERY RULES TO RUNTIME");
 	admin_queries.push_back(std::string("SET mysql-have_ssl='") + std::string(frontend_ssl ? "true" : "false") + "'");
 	admin_queries.push_back("LOAD MYSQL VARIABLES TO RUNTIME");
 	admin_queries.push_back(std::string("UPDATE mysql_servers SET use_ssl=") + std::string(backend_ssl ? "1" : "0"));