MDEV-35643 Add support for MySQL 8.0 binlog events

MDEV-29533 Crash when MariaDB is replica of MySQL 8.0

MySQL 8.0 has added the following new events in the MySQL binary log

PARTIAL_UPDATE_ROWS_EVENT
TRANSACTION_PAYLOAD_EVENT
HEARTBEAT_LOG_EVENT_V2

- PARTIAL_UPDATE_ROWS_EVENT is used by MySQL to generate update
  statements using JSON_SET, JSON_REPLACE and JSON_REMOVE to make
  update of JSON columns more efficient.  These events can be
  disabled by setting 'binlog-row-value-options=""'
- TRANSACTION_PAYLOAD_EVENT is used by MySQL to signal that a
  row event is compressed. It an be disably by setting
  'binlog_transaction_compression=0'.
- HEARTBEAT_LOG_EVENT_V2 is written to the binary log many times
  per seconds. It can be ignored by the server.

What this patch does:

- If PARTIAL_UPDATE_ROWS_EVENT or TRANSACTION_PAYLOAD_EVENT is found,
  the server will stop with an error message of how to disable the
  MySQL server to generate such events.
- HEARTBEAT_LOG_EVENT_V2 events are ignored.
- mariadb-binlog will write the name of the new events.
- mariadb-binlog will stop if PARTIAL_UPDATE_ROWS_EVENT or
  TRANSACTION_PAYLOAD_EVENT is found, unless --force is given.
- Fixes a crash in mariadb-binlog if a character set unknown to
  MariaDB is found. (MDEV-29533)

From Kristian Nielsen:
- Add test case for MySQL 8.0 to MariaDB replication and fixed a
  a small typo in post_header_len initialization.

Reviewer: knielsen@mariadb.org

mysql-test/suite/rpl/r/rpl_from_mysql80.result

@@ -0,0 +1,52 @@
+include/master-slave.inc
+[connection master]
+connection slave;
+include/stop_slave.inc
+connection master;
+include/rpl_stop_server.inc [server_number=1]
+include/rpl_start_server.inc [server_number=1]
+connection slave;
+CHANGE MASTER TO Master_log_file='master-bin.000001', Master_log_pos=4, Master_use_gtid=No;
+START SLAVE IO_THREAD;
+include/wait_for_slave_io_to_start.inc
+START SLAVE UNTIL Master_log_file='master-bin.000001', Master_log_pos= 1178;
+SELECT MASTER_POS_WAIT('master-bin.000001', 1178, 60);
+MASTER_POS_WAIT('master-bin.000001', 1178, 60)
+NULL
+SELECT * FROM t1 ORDER BY a;
+a	b	c
+1	0	
+2	0	hulu
+3	0	bulu
+include/wait_for_slave_sql_to_stop.inc
+START SLAVE;
+include/wait_for_slave_sql_error.inc [errno=1594]
+STOP SLAVE IO_THREAD;
+include/wait_for_slave_io_to_stop.inc
+CHANGE MASTER TO Master_log_file='master-bin.000001', Master_log_pos=2297;
+START SLAVE IO_THREAD;
+START SLAVE SQL_THREAD;
+include/wait_for_slave_io_to_start.inc
+include/wait_for_slave_sql_error.inc [errno=1594]
+SELECT * FROM t1 ORDER BY a;
+a	b	c
+1	0	
+2	0	hulu
+3	0	bulu
+4	0	skip
+5	0	after compressed
+SELECT * FROM t2 ORDER BY a;
+a	b
+1	{"a": "hulu", "b": "[zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy][zyzzy]", "c": "bulu"}
+STOP SLAVE IO_THREAD;
+include/wait_for_slave_io_to_stop.inc
+CHANGE MASTER TO Master_log_file='master-bin.000002', Master_log_pos=4;
+START SLAVE IO_THREAD;
+START SLAVE SQL_THREAD;
+include/wait_for_slave_io_to_start.inc
+include/wait_for_slave_sql_to_start.inc
+DROP TABLE t1, t2;
+CALL mtr.add_suppression('TRANSACTION_PAYLOAD_EVENT event. You can avoid this event by specifying');
+CALL mtr.add_suppression('PARTIAL_UPDATE_ROWS_EVENT event. You can avoid this event by specifying');
+connection master;
+include/rpl_end.inc