BUG#26395: if crash during autocommit update to transactional table on master, slave fails

Now, every transaction (including autocommit transactions) start with
a BEGIN and end with a COMMIT/ROLLBACK in the binlog.
Added a test case, and updated lots of test case result files.


mysql-test/t/rpl_transaction-master.opt:
  BitKeeper file /home/sven/bk/b26395-autocommit-xa/5.0-rpl/mysql-test/t/rpl_transaction-master.opt
mysql-test/t/rpl_transaction-slave.opt:
  BitKeeper file /home/sven/bk/b26395-autocommit-xa/5.0-rpl/mysql-test/t/rpl_transaction-slave.opt
mysql-test/r/mix_innodb_myisam_binlog.result:
  Updated result file
mysql-test/r/multi_update.result:
  Updated result file
mysql-test/r/rpl_transaction.result:
  New result file for new test case.
mysql-test/r/sp_trans_log.result:
  Updated result file
mysql-test/r/variables-big.result:
  Updated result file
mysql-test/t/rpl_transaction.test:
  New test case.
sql/log.cc:
   - Always write BEGIN and COMMIT around statements, even in autocommit
     mode.
   - Added comments for binlog_commit and binlog_rollback.
sql/log_event.cc:
  Added debug trigger to avoid writing xid events to the binlog.

1 files changed, 1 insertions, 0 deletions

diff --git a/sql/log_event.cc b/sql/log_event.cc
index 965dfb5f5cf..a950094a018 100644
--- a/sql/log_event.cc
+++ b/sql/log_event.cc
@@ -3793,6 +3793,7 @@ Xid_log_event(const char* buf,
 #ifndef MYSQL_CLIENT
 bool Xid_log_event::write(IO_CACHE* file)
 {
+  DBUG_EXECUTE_IF("do_not_write_xid", return 0;);
   return write_header(file, sizeof(xid)) ||
          my_b_safe_write(file, (byte*) &xid, sizeof(xid));
 }