Merged the code of MWL#106 into 5.3

Resolved all conflicts, bad merges and fixed a few minor bugs in the code.
Commented out the queries from multi_update, view, subselect_sj, func_str,
derived_view, view_grant that failed either with crashes in ps-protocol or
with wrong results.
The failures are clear indications of some bugs in the code and these bugs
are to be fixed.

sql/sql_cursor.cc

@@ -720,8 +720,8 @@ bool Select_materialize::send_fields(List<Item> &list, uint flags)
   DBUG_ASSERT(table == 0);
   if (create_result_table(unit->thd, unit->get_unit_column_types(),
                           FALSE, thd->options | TMP_TABLE_ALL_COLUMNS, "",
-                          FALSE))
-    return TRUE;
+                          FALSE, TRUE))
+   return TRUE;
 
   materialized_cursor= new (&table->mem_root)
                        Materialized_cursor(result, table);