Fix var name

v_domain - not a constant

web/add/web/index.php

@@ -333,7 +333,7 @@ if (!empty($_POST['ok'])) {
 
     // Flush field values on success
     if (empty($_SESSION['error_msg'])) {
-        $_SESSION['ok_msg'] = __('WEB_DOMAIN_CREATED_OK',htmlentities($_POST[v_domain]),htmlentities($_POST[v_domain]));
+        $_SESSION['ok_msg'] = __('WEB_DOMAIN_CREATED_OK',htmlentities($_POST['v_domain']),htmlentities($_POST['v_domain']));
         unset($v_domain);
         unset($v_aliases);
         unset($v_ssl);