added code comment for 'directory_trigger' config value which is not yet implemented
diff --git a/system/application/config/config.php b/system/application/config/config.php
index 6a7b857..24fbb4b 100644
--- a/system/application/config/config.php
+++ b/system/application/config/config.php
@@ -149,7 +149,7 @@
 |

 */

 $config['enable_query_strings'] = FALSE;

-$config['directory_trigger'] = 'd';

+$config['directory_trigger'] = 'd';	 // experimental not currently in use

 $config['controller_trigger'] = 'c';

 $config['function_trigger'] = 'm';