Merge branch '5.0' into 5.1

* 5.0:
  Fix subtype in TextPart constructor calls
  Update security.rst

Author: javiereguiluz

components/mime.rst

@@ -166,7 +166,7 @@ different parts of the email by hand::
     ;
 
     $textContent = new TextPart('Lorem ipsum...');
-    $htmlContent = new TextPart('<h1>Lorem ipsum</h1> <p>...</p>', 'html');
+    $htmlContent = new TextPart('<h1>Lorem ipsum</h1> <p>...</p>', null, 'html');
     $body = new AlternativePart($textContent, $htmlContent);
 
     $email = new Message($headers, $body);
@@ -188,7 +188,7 @@ email multiparts::
     $textContent = new TextPart('Lorem ipsum...');
     $htmlContent = new TextPart(sprintf(
         '<img src="cid:%s"/> <h1>Lorem ipsum</h1> <p>...</p>', $imageCid
-    ), 'html');
+    ), null, 'html');
     $bodyContent = new AlternativePart($textContent, $htmlContent);
     $body = new RelatedPart($bodyContent, $embeddedImage);
 

security.rst

@@ -904,7 +904,7 @@ Next, you'll need to create a route for this URL (but not a controller):
         use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
 
         return function (RoutingConfigurator $routes) {
-            $routes->add('logout', '/logout')
+            $routes->add('app_logout', '/logout')
                 ->methods(['GET'])
             ;
         };