Don't require the user to login again if they're already signed into cas.

git-svn-id: file:///tmp/wdn_thm_drupal/branches/drupal-7.x@96 20a16fea-79d4-4915-8869-1ea9d5ebf173

sites/all/modules/unl/unl_cas.module

@@ -86,7 +86,7 @@ function unl_cas_form_alter(&$form, $form_state, $form_id)
     if ($form_id == 'user_login') {
         $_SESSION['unl_cas']['previous_path'] = request_path();
     	$cas = unl_cas_get_adapter();
-    	$cas->setRenew();
+    	//$cas->setRenew();
     	drupal_goto($cas->getLoginUrl());
     }
 }