minor #7201 Simplified the framework configuration reference (javiereguiluz, weaverryan)

This PR was merged into the 2.7 branch.

Discussion
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Simplified the framework configuration reference

I propose two main changes:

* Show how can users display the default config and their own config.
* Remove the dump of the default config values.

I never liked the config dump because in my opinion:

* It simply adds "noise" and doesn't explain anything
* It's hard to maintain it updated
* The same can easily be achieved with a dedicated console command
* Removing it will simplify the work of doc maintainers and it'll reduce the merge conflicts
* These references are very useful for the config option descriptions, not for just listing those options

Thoughts? Thanks!

PS: if you agree, I'll update the rest of the references.

Commits
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a71ef9d Shortened command... easier to remember ;)
2d68dc3 Last fixes
b91b196 Restored the "Full Default Configuration" dump
396548c Fixed an indentation issue
8076c40 Simplified the framework configuration reference

Author: weaverryan

reference/configuration/framework.rst

@@ -4,18 +4,23 @@
 FrameworkBundle Configuration ("framework")
 ===========================================
 
-The FrameworkBundle contains most of the "base" framework functionality
-and can be configured under the ``framework`` key in your application
-configuration. When using XML, you must use the
-``http://symfony.com/schema/dic/symfony`` namespace.
+The FrameworkBundle defines the main framework configuration, from sessions and
+translations to forms, validation, routing and more. All these options are
+configured under the ``framework`` key in your application configuration.
 
-This includes settings related to sessions, translation, forms, validation,
-routing and more.
+.. code-block:: terminal
 
-.. tip::
+    # displays the default config values defined by Symfony
+    $ php bin/console config:dump framework
+
+    # displays the actual config values used by your application
+    $ php bin/console debug:config framework
+
+.. note::
 
-   The XSD schema is available at
-   ``http://symfony.com/schema/dic/symfony/symfony-1.0.xsd``.
+    When using XML, you must use the ``http://symfony.com/schema/dic/symfony``
+    namespace and the related XSD schema is available at:
+    ``http://symfony.com/schema/dic/symfony/symfony-1.0.xsd``
 
 Configuration
 -------------