Merge branch '4.4' into 5.1

* 4.4:
  Fix missing namespace and other wrong wording from Security and Serializer context

Author: javiereguiluz

security/access_denied_handler.rst

@@ -13,6 +13,7 @@ This interface defines one method called ``handle()`` where you can implement wh
 logic that should run when access is denied for the current user (e.g. send a
 mail, log a message, or generally return a custom response)::
 
+    // src/Security/AccessDeniedHandler.php
     namespace App\Security;
 
     use Symfony\Component\HttpFoundation\Request;

security/csrf.rst

@@ -83,6 +83,9 @@ protected against CSRF attacks.
 By default Symfony adds the CSRF token in a hidden field called ``_token``, but
 this can be customized on a form-by-form basis::
 
+    // src/Form/TaskType.php
+    namespace App\Form;
+    
     // ...
     use App\Entity\Task;
     use Symfony\Component\OptionsResolver\OptionsResolver;

security/custom_authentication_provider.rst

@@ -541,6 +541,11 @@ can have different timeout lengths.
 You will first need to edit ``WsseFactory`` and define the new option in
 the ``addConfiguration()`` method::
 
+    // src/DependencyInjection/Security/Factory/WsseFactory.php
+    namespace App\DependencyInjection\Security\Factory;
+
+    // ...
+
     class WsseFactory implements SecurityFactoryInterface
     {
         // ...
@@ -559,6 +564,9 @@ contain a ``lifetime`` key, set to 5 minutes (300 seconds) unless otherwise
 set in the configuration. Pass this argument to your authentication provider
 in order to put it to use::
 
+    // src/DependencyInjection/Security/Factory/WsseFactory.php
+    namespace App\DependencyInjection\Security\Factory;
+    
     use App\Security\Authentication\Provider\WsseProvider;
 
     class WsseFactory implements SecurityFactoryInterface

security/form_login.rst

@@ -96,6 +96,7 @@ configuration (``login``):
     .. code-block:: php-annotations
 
         // src/Controller/SecurityController.php
+        namespace App\Controller;
 
         // ...
         use Symfony\Component\Routing\Annotation\Route;

security/form_login_setup.rst

@@ -481,6 +481,7 @@ If you also want to apply this behavior to public pages, you can create an
 :doc:`event subscriber </event_dispatcher>` to set the target path manually
 whenever the user browses a page::
 
+    // src/EventSubscriber/RequestSubscriber.php
     namespace App\EventSubscriber;
 
     use Symfony\Component\EventDispatcher\EventSubscriberInterface;

security/guard_authentication.rst

@@ -33,6 +33,8 @@ your ``User`` class (the ``make:entity`` command is a good way to do this):
 .. code-block:: diff
 
     // src/Entity/User.php
+    namespace App\Entity;
+
     // ...
 
     class User implements UserInterface
@@ -419,6 +421,8 @@ You can throw this from ``getCredentials()``, ``getUser()`` or ``checkCredential
 to cause a failure::
 
     // src/Security/TokenAuthenticator.php
+    namespace App\Security;
+
     // ...
 
     use Symfony\Component\Security\Core\Exception\CustomUserMessageAuthenticationException;
@@ -461,8 +465,9 @@ completes registration. To do that, use your authenticator and a service called
 ``GuardAuthenticatorHandler``::
 
     // src/Controller/RegistrationController.php
+    namespace App\Controller;
+    
     // ...
-
     use App\Security\LoginFormAuthenticator;
     use Symfony\Component\HttpFoundation\Request;
     use Symfony\Component\Security\Guard\GuardAuthenticatorHandler;

security/impersonating_user.rst

@@ -116,6 +116,9 @@ stored in the token storage will be a ``SwitchUserToken`` instance. Use the
 following snippet to obtain the original token which gives you access to
 the impersonator user::
 
+    // src/Service/SomeService.php
+    namespace App\Service;
+
     use Symfony\Component\Security\Core\Authentication\Token\SwitchUserToken;
     use Symfony\Component\Security\Core\Security;
     // ...
@@ -263,6 +266,7 @@ be called):
 Then, create a voter class that responds to this role and includes whatever custom
 logic you want::
 
+    // src/Service/Voter/SwitchToCustomerVoter.php
     namespace App\Security\Voter;
 
     use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;

security/json_login_setup.rst

@@ -68,6 +68,7 @@ The next step is to configure a route in your app matching this path:
     .. code-block:: php-annotations
 
         // src/Controller/SecurityController.php
+        namespace App\Controller;
 
         // ...
         use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

security/named_encoders.rst

@@ -121,8 +121,8 @@ to use it, the class must implement
 The interface requires one method - ``getEncoderName()`` - which should return
 the name of the encoder to use::
 
-    // src/Acme/UserBundle/Entity/User.php
-    namespace Acme\UserBundle\Entity;
+    // src/Entity/User.php
+    namespace App\Entity;
 
     use Symfony\Component\Security\Core\Encoder\EncoderAwareInterface;
     use Symfony\Component\Security\Core\User\UserInterface;

serializer/custom_encoders.rst

@@ -19,6 +19,7 @@ Imagine you want to serialize and deserialize YAML. For that you'll have to
 create your own encoder that uses the
 :doc:`Yaml Component </components/yaml>`::
 
+    // src/Serializer/YamlEncoder.php
     namespace App\Serializer;
 
     use Symfony\Component\Serializer\Encoder\DecoderInterface;