Merge branch '2.7' into 2.8

* 2.7:
  [HttpKernel] Inline ValidateRequestListener logic into HttpKernel
  fixed HttpKernel dependencies after #18688

Conflicts:
	src/Symfony/Component/HttpKernel/composer.json

Author: nicolas-grekas

Resources/config/web.xml

@@ -46,9 +46,5 @@
             <argument type="service" id="request_stack" />
             <tag name="kernel.event_subscriber" />
         </service>
-
-        <service id="validate_request_listener" class="Symfony\Component\HttpKernel\EventListener\ValidateRequestListener">
-            <tag name="kernel.event_subscriber" />
-        </service>
     </services>
 </container>