global 'opening tables' lock." after merging it into 5.1 tree.


mysql-test/r/alter_table-big.result:
  Fixed "show binlog events" usage as 5.1 and 5.0 sizes of binlog
  events differ.
mysql-test/t/alter_table-big.test:
  This test needs statement based binlogging.
  Also fixed "show binlog events" usage as 5.1 and 5.0 sizes
  of binlog events differ.