N°8771 - Add Symfony form component to iTop core (#760)

- Add Symfony Form Component
- Add Symfony CSRF security component
- Add iTop default form template
- Add Twig debug extension to Twig Environment
- Add iTop abstract controller facility to get form builder
- Add Twig filter to make trans an alias of dict_s filter

lib/symfony/security-core/User/UserCheckerInterface.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Security\Core\User;
+
+use Symfony\Component\Security\Core\Exception\AccountStatusException;
+
+/**
+ * Implement to throw AccountStatusException during the authentication process.
+ *
+ * Can be used when you want to check the account status, e.g when the account is
+ * disabled or blocked. This should not be used to make authentication decisions.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface UserCheckerInterface
+{
+    /**
+     * Checks the user account before authentication.
+     *
+     * @return void
+     *
+     * @throws AccountStatusException
+     */
+    public function checkPreAuth(UserInterface $user);
+
+    /**
+     * Checks the user account after authentication.
+     *
+     * @return void
+     *
+     * @throws AccountStatusException
+     */
+    public function checkPostAuth(UserInterface $user);
+}