MDEV-29741 SHOW BINLOG EVENTS shows garbage with system_versioning_insert_history=on

mysql-test/suite/versioning/r/binlog.result

+#
+# MDEV-29741 SHOW BINLOG EVENTS shows garbage with system_versioning_insert_history=on
+#
+reset master;
+create table t (a int) with system versioning;
+set system_versioning_insert_history= on;
+insert into t (a) values (1);
+set system_versioning_insert_history= off;
+drop table t;
+include/show_binlog_events.inc
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; create table t (a int) with system versioning
+master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; set @@system_versioning_insert_history=1; insert into t (a) values (1)
+master-bin.000001	#	Query	#	#	set @@system_versioning_insert_history=1; COMMIT
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; DROP TABLE `t` /* generated by server */

mysql-test/suite/versioning/t/binlog.test

+--source include/have_log_bin.inc
+
+--echo #
+--echo # MDEV-29741 SHOW BINLOG EVENTS shows garbage with system_versioning_insert_history=on
+--echo #
+
+reset master;
+create table t (a int) with system versioning;
+set system_versioning_insert_history= on;
+insert into t (a) values (1);
+set system_versioning_insert_history= off;
+drop table t;
+source include/show_binlog_events.inc;

sql/log_event_server.cc

@@ -1056,6 +1056,8 @@ void Query_log_event::pack_info(Protocol *protocol)
       buf.append(STRING_WITH_LEN("check_constraint_checks=1, "));
     if (flags2 & OPTION_IF_EXISTS)
       buf.append(STRING_WITH_LEN("@@sql_if_exists=1, "));
+    if (flags2 & OPTION_INSERT_HISTORY)
+      buf.append(STRING_WITH_LEN("@@system_versioning_insert_history=1, "));
     buf[buf.length()-2]=';';
   }
   if (query && q_len)