fixes #1292 ability to avoid the reserved words escape in pwg_query

Useful for conf_update_param because we don't want any modification in the config.value and we know we won't use the reserved words in the SQL.

include/functions.inc.php

@@ -1381,7 +1381,7 @@ INSERT INTO
   ON DUPLICATE KEY UPDATE value = \''.$dbValue.'\'
 ;';
 
-  pwg_query($query);
+  pwg_query($query, false);
 
   if ($updateGlobal)
   {