Merge branch '3.4' into 4.4

* 3.4:
  Update access_denied_handler.rst
  Update access_control.rst

Author: javiereguiluz

security/access_control.rst

@@ -337,7 +337,7 @@ key:
                     // the 'role' and 'allow-if' options work like an OR expression, so
                     // access is granted if the expression is TRUE or the user has ROLE_ADMIN
                     'roles' => 'ROLE_ADMIN',
-                    'allow_if' => '"127.0.0.1" == request.getClientIp() or request.headers.has('X-Secure-Access')',
+                    'allow_if' => '"127.0.0.1" == request.getClientIp() or request.headers.has("X-Secure-Access")',
                 ],
             ],
         ]);

security/access_denied_handler.rst

@@ -51,7 +51,7 @@ configure it under your firewall:
         <!-- config/packages/security.xml -->
         <config>
             <firewall name="main">
-                <access_denied_handler>App\Security\AccessDeniedHandler</access_denied_handler>
+                <access-denied-handler>App\Security\AccessDeniedHandler</access-denied-handler>
             </firewall>
         </config>