Reducing risk for incorrect merges. Since we are multiple teams working on

different features, adding numbering to enums reduce the risk that code will
be merged incorrectly.  This particular enum must have fixed values to ensure
that an upgraded server always can read old logs.  I added this, since I 
noticed the incorrect order in the RBR clone.

sql/log_event.h

@@ -403,20 +403,21 @@ enum Log_event_type
     Every time you update this enum (when you add a type), you have to
     fix Format_description_log_event::Format_description_log_event().
   */
-  UNKNOWN_EVENT= 0, START_EVENT_V3, QUERY_EVENT, STOP_EVENT, ROTATE_EVENT,
-  INTVAR_EVENT, LOAD_EVENT, SLAVE_EVENT, CREATE_FILE_EVENT,
-  APPEND_BLOCK_EVENT, EXEC_LOAD_EVENT, DELETE_FILE_EVENT,
+  UNKNOWN_EVENT= 0, START_EVENT_V3= 1, QUERY_EVENT= 2, STOP_EVENT= 3,
+  ROTATE_EVENT= 4, INTVAR_EVENT= 5, LOAD_EVENT= 6, SLAVE_EVENT= 7,
+  CREATE_FILE_EVENT= 8, APPEND_BLOCK_EVENT= 9, EXEC_LOAD_EVENT= 10,
+  DELETE_FILE_EVENT= 11,
   /*
     NEW_LOAD_EVENT is like LOAD_EVENT except that it has a longer
     sql_ex, allowing multibyte TERMINATED BY etc; both types share the
     same class (Load_log_event)
   */
-  NEW_LOAD_EVENT,
-  RAND_EVENT, USER_VAR_EVENT,
-  FORMAT_DESCRIPTION_EVENT,
-  XID_EVENT,
-  BEGIN_LOAD_QUERY_EVENT,
-  EXECUTE_LOAD_QUERY_EVENT,
+  NEW_LOAD_EVENT= 12,
+  RAND_EVENT, USER_VAR_EVENT= 13,
+  FORMAT_DESCRIPTION_EVENT= 14,
+  XID_EVENT= 15,
+  BEGIN_LOAD_QUERY_EVENT= 16,
+  EXECUTE_LOAD_QUERY_EVENT= 17,
 
   /*
     add new events here - right above this comment!