Do not register CSRF token

The session is closed at this point since it may come over CLI => 💣

Fixes owncloud/core#23205

lib/mailqueuehandler.php

@@ -247,7 +247,7 @@ public function sendEmailToUser($userName, $email, $lang, $timezone, $maxTime) {
 			);
 		}
 
-		$alttext = new Template('activity', 'email.notification', '');
+		$alttext = new Template('activity', 'email.notification', '', false);
 		$alttext->assign('username', $user->getDisplayName());
 		$alttext->assign('activities', $activityList);
 		$alttext->assign('skippedCount', $skippedCount);