Handle CAS logouts.

git-svn-id: file:///tmp/wdn_thm_drupal/branches/drupal-7.x@72 20a16fea-79d4-4915-8869-1ea9d5ebf173

sites/all/modules/unl/unl_cas.module

@@ -5,13 +5,16 @@ function unl_cas_init()
     require_once dirname(__FILE__) . '/lib/CAS/CAS.php';
     phpCAS::client(CAS_VERSION_2_0,'login.unl.edu',443,'/cas');
     phpCAS::setNoCasServerValidation();
+    phpCAS::handleLogoutRequests();
     
     if (!array_key_exists('last_sso_check', $_SESSION)) {
         $_SESSION['unl']['last_sso_check'] = 0;
     }
     
+    $auth = FALSE;
     if (array_key_exists('unl_sso', $_COOKIE)) {
         $auth = phpCAS::checkAuthentication();
+    }
     if ($auth) {
         $username = phpCAS::getUser();
         $user = user_load_by_name($username);
@@ -22,7 +25,9 @@ function unl_cas_init()
             $GLOBALS['user'] = $user;
             user_login_finalize();
         }
-        }
+    } else if (!user_is_anonymous()) {
+        $GLOBALS['user'] = drupal_anonymous_user();
+        user_login_finalize();
     }
 }