#200424 by mpare and myself: strengten the note that all settings.php set...

#200424 by mpare and myself: strengten the note that all settings.php set configuration options are fixed, and cannot be modified on the web interface

sites/default/default.settings.php

@@ -164,7 +164,9 @@
  * set them here. You usually don't need to use this feature. This is
  * useful in a configuration file for a vhost or directory, rather than
  * the default settings.php. Any configuration setting from the 'variable'
- * table can be given a new value.
+ * table can be given a new value. Note that any values your provide in
+ * these variable overrides will not be modifiable from the Drupal 
+ * administration interface.
  *
  * Remove the leading hash signs to enable.
  */