Made two configuration sub guides flex-ready

Author: wouterj

configuration/configuration_organization.rst

@@ -4,10 +4,9 @@
 How to Organize Configuration Files
 ===================================
 
-The default Symfony Standard Edition defines three
-:doc:`execution environments </configuration/environments>` called
-``dev``, ``prod`` and ``test``. An environment simply represents a way to
-execute the same codebase with different configurations.
+The Symfony skeleton defines three :doc:`execution environments </configuration/environments>`
+called ``dev``, ``prod`` and ``test``. An environment simply represents a way
+to execute the same codebase with different configurations.
 
 In order to select the configuration file to load for each environment, Symfony
 executes the ``registerContainerConfiguration()`` method of the ``AppKernel``
@@ -17,7 +16,7 @@ class::
     use Symfony\Component\HttpKernel\Kernel;
     use Symfony\Component\Config\Loader\LoaderInterface;
 
-    class AppKernel extends Kernel
+    class Kernel extends BaseKernel
     {
         // ...