Move server_{links,common}.inc.php to libraries folder as it does not require direct access.

server_variables.php

@@ -7,13 +7,13 @@ require_once('./libraries/common.lib.php');
 /**
  * Does the common work
  */
-require('./server_common.inc.php');
+require('./libraries/server_common.inc.php');
 
 
 /**
  * Displays the links
  */
-require('./server_links.inc.php');
+require('./libraries/server_links.inc.php');
 
 
 /**