Move config-defaults.php to lib/, and add text explaining its role.

This is to prevent people copying it by mistake instead of config-dist.php

htdocs/config-defaults.php → htdocs/lib/config-defaults.php

@@ -24,29 +24,18 @@
  *
  */
 
-$cfg = new StdClass;
-
+//
+// CONFIGURATION DEFAULTS
+//
+// Do Not Edit This File!
+//
+// If you see a setting in here you'd like to change, copy it to your 
+// config.php and change it there.
+//
+// This file sets defaults that are useful for most people.
+//
 
-// database connection details
-// valid values for dbtype are 'postgres8' and 'mysql5'
-$cfg->dbtype   = 'postgres8';
-$cfg->dbhost   = 'localhost';
-$cfg->dbport   = null;
-$cfg->dbname   = '';
-$cfg->dbuser   = '';
-$cfg->dbpass   = '';
-$cfg->dbprefix = '';
-
-// wwwroot - the web-visible path to your Mahara installation
-// Normally, this is automatically detected - if it doesn't work for you
-// then try specifying it here
-//$cfg->wwwroot = 'http://myhost.com/mahara/';
-
-// dataroot - uploaded files are stored here
-// must be writable by the webserver and outside document root.
-// Mahara will NOT RUN if this is inside your document root, because
-// this is a big security hole.
-$cfg->dataroot = '/path/to/uploaddir';
+$cfg = new StdClass;
 
 // directorypermissions - what permissions to use for files and directories in 
 // dataroot. The default allows only the web server user to read the data. If