Modify search to use cn instead of uid.

application/modules/auth/models/UserModel.php

@@ -206,7 +206,7 @@ class Auth_UserModel extends Unl_Model {
 
         $person = self::fetchNew();
 
-        $filter = 'uid='
+        $filter = 'cn='
                 . strtr($userName,
                         array(',' => '', '=' => '', ' ' => ''));
         $userInfo = self::$_ldap->search('ou=people,dc=unl,dc=edu', $filter);