The idea of the fix is to extend support of non-SUID triggers for backward
compatibility. Formerly non-SUID triggers were appeared when "new" server
is being started against "old" database. Now, they are also created when
"new" slave receives updates from "old" master.


mysql-test/r/rpl_trigger.result:
  Updated the result file with the results of the test for BUG#16266.
mysql-test/t/rpl_trigger.test:
  Added the test case for BUG#16266.
sql/mysql_priv.h:
  Added an utility operation to be used from sql_yacc.yy.
sql/sql_parse.cc:
  Add a utility operation to be used from sql_yacc.yy.
sql/sql_trigger.cc:
  Extend support of non-SUID triggers.
sql/sql_view.cc:
  Initialize LEX::definer if DEFINER-clause is missing.
sql/sql_yacc.yy:
  Extended support of non-SUID triggers.
mysql-test/std_data/bug16266.000001:
  A new binlog file for testing a patch for BUG#16266.