Fix incorrect static calls

Author: tvdijen

www/logout.php

@@ -58,14 +58,16 @@
     $ticketStore->deleteTicket($session->getSessionId());
 }
 
+$httpUtils = new \SimpleSAML\Utils\HTTP();
+
 if ($as->isAuthenticated()) {
     \SimpleSAML\Logger::debug('casserver: performing a real logout');
 
     if ($casconfig->getValue('skip_logout_page', false)) {
         $as->logout($_GET['url']);
     } else {
         $as->logout(
-            \SimpleSAML\Utils\HTTP::addURLParameters(
+            $httpUtils->addURLParameters(
                 \SimpleSAML\Module::getModuleURL('casserver/loggedOut.php'),
                 array_key_exists('url', $_GET) ? ['url' => $_GET['url']] : []
             )
@@ -75,10 +77,10 @@
     \SimpleSAML\Logger::debug('casserver: no session to log out of, performing redirect');
 
     if ($casconfig->getValue('skip_logout_page', false)) {
-        \SimpleSAML\Utils\HTTP::redirectTrustedURL(SimpleSAML\Utils\HTTP::addURLParameters($_GET['url'], []));
+        $httpUtils->redirectTrustedURL($httpUtils->addURLParameters($_GET['url'], []));
     } else {
-        \SimpleSAML\Utils\HTTP::redirectTrustedURL(
-            \SimpleSAML\Utils\HTTP::addURLParameters(
+        $httpUtils->redirectTrustedURL(
+            $httpUtils->addURLParameters(
                 \SimpleSAML\Module::getModuleURL('casserver/loggedOut.php'),
                 array_key_exists('url', $_GET) ? ['url' => $_GET['url']] : []
             )

www/utility/validateTicket.php

@@ -102,8 +102,9 @@
                             'proxies' => array_merge([$serviceUrl], $serviceTicket['proxies']),
                             'sessionId' => $serviceTicket['sessionId']
                         ]);
+                        $httpUtils = new Utils\HTTP();
                         try {
-                            Utils\HTTP::fetch($pgtUrl . '?pgtIou=' . $proxyGrantingTicket['iou'] .
+                            $httpUtils->fetch($pgtUrl . '?pgtIou=' . $proxyGrantingTicket['iou'] .
                                 '&pgtId=' . $proxyGrantingTicket['id']);
 
                             $protocol->setProxyGrantingTicketIOU($proxyGrantingTicket['iou']);