Fix for BUG#4971 "CREATE TABLE ... TYPE=HEAP SELECT ... stops slave (wrong DELETE in binlog)":

replacing the no_log argument of mysql_create_table() by some safer method
(temporarily setting OPTION_BIN_LOG to 0) which guarantees that even the automatic
DELETE FROM heap_table does not get into the binlog when a not-yet-existing HEAP table
is opened by mysql_create_table().


mysql-test/r/rpl_heap.result:
  result update
mysql-test/t/rpl_heap.test:
  testing a bug
sql/log.cc:
  new class Disable_binlog used to temporarily disable binlogging for one thread.
sql/mysql_priv.h:
  removing argument no_log from mysql_create_table(); no_log was perfect as some
  binlogging could still be done by open_unireg_entry() for a HEAP table.
sql/sql_class.h:
  new class Disable_binlog used to temporarily disable binlogging for one thread.
sql/sql_parse.cc:
  removing no_log
sql/sql_table.cc:
  removing no_log from mysql_create_table(); instead using new class Disable_binlog.
  Disabling binlogging in some cases, where the binlogging is done later by some other code
  (case of CREATE SELECT and ALTER).

sql/sql_parse.cc

@@ -1692,7 +1692,7 @@ mysql_execute_command(void)
 			       tables->real_name,
 			       &lex->create_info,
 			       lex->create_list,
-			       lex->key_list,0, 0); // do logging
+			       lex->key_list,0);
       if (!res)
 	send_ok(&thd->net);
     }