added link to the http cache documentation

Author: alexander-schranz

Resources/doc/features/symfony-http-cache.rst

@@ -26,7 +26,7 @@ Event Dispatching HttpCache
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 You need to adjust your ``AppCache`` to support event handling and register the
-cache event listeners for the functionality you want to use.
+cache event listeners for the functionality you want to use.git st
 
 To adjust your cache kernel, follow the instructions in the :ref:`FOSHttpCache Symfony Cache documentation section <foshttpcache:symfony httpcache configuration>`.
 
@@ -98,8 +98,7 @@ your kernel like this::
         }
     }
 
-Now you need to adjust your front controller to use that cache instance rather
-than creating one::
+Now you need to adjust your front controller (that you set up according to the `Symfony HttpCache documentation_`) to use that cache instance rather than creating one::
 
     // public/index.php
 
@@ -112,6 +111,8 @@ than creating one::
         $kernel = $kernel->getHttpCache();
     }
 
+    // ...
+
 .. warning::
 
     If you do not want to instantiate the cache kernel in your kernel