Merge branch '4.0'

* 4.0: (44 commits)
  upgrading the upgrade docs
  Removed some mentions to deprecated features
  Remove references to AppKernel
  Removed references to the web/ directory
  Remove some wrong uses of the app/ dir
  Remove references to "standard edition" or "distributions"
  Fixed some *.yml file extensions
  Remove git project setup
  Updating the content of service_container
  Update validation path
  bad syntax
  updating most of the quick tour
  removing bad link
  removing a now-tiny article about git setup
  yaml
  removing diff - does not work with config block
  removing a tiny chapter
  Removed Assetic DIC tags
  Minor changes
  Fixed non-existent reference
  ...

Author: weaverryan

_build/redirection_map

@@ -122,7 +122,8 @@
 /cookbook/console/logging /console/logging
 /cookbook/console/request_context /console/request_context
 /cookbook/console/style /console/style
-/cookbook/console/usage /console/usage
+/cookbook/console/usage /console
+/console/usage /console
 /cookbook/controller/csrf_token_validation /controller/csrf_token_validation
 /cookbook/controller/error_pages /controller/error_pages
 /cookbook/controller/forwarding /controller/forwarding
@@ -153,10 +154,10 @@
 /cookbook/doctrine/reverse_engineering /doctrine/reverse_engineering
 /doctrine/repository /doctrine
 /doctrine/console /doctrine
-/cookbook/email/cloud /email/cloud
+/cookbook/email/cloud /email
 /cookbook/email/dev_environment /email/dev_environment
 /cookbook/email/email /email
-/cookbook/email/gmail /email/gmail
+/cookbook/email/gmail /email
 /cookbook/email/index /email
 /cookbook/email/spool /email/spool
 /cookbook/email/testing /email/testing
@@ -286,19 +287,28 @@
 /cookbook/web_services/php_soap_extension /controller/soap_web_service
 /cookbook/workflow/homestead /setup/homestead
 /cookbook/workflow/index /setup
-/cookbook/workflow/new_project_git /setup/new_project_git
-/cookbook/workflow/new_project_svn /setup/new_project_git
-/setup/new_project_svn /setup/new_project_git
+/cookbook/workflow/new_project_git /setup
+/cookbook/workflow/new_project_svn /setup
+/setup/new_project_git /setup
+/setup/new_project_svn /setup
 /components/asset/index /components/asset
 /components/asset/introduction /components/asset
 /components/browser_kit/index /components/browser_kit
 /components/browser_kit/introduction /components/browser_kit
 /components/class_loader/introduction /components/class_loader
 /components/class_loader/index /components/class_loader
+/components/class_loader/cache_class_loader /components/class_loader
+/components/class_loader/class_loader /components/class_loader
+/components/class_loader/class_map_generator /components/class_loader
+/components/class_loader/debug_class_loader /components/class_loader
+/components/class_loader/map_class_loader /components/class_loader
+/components/class_loader/map_class_loader /components/class_loader
+/components/class_loader/psr4_class_loader /components/class_loader
 /components/config/introduction /components/config
 /components/config/index /components/config
 /components/console/helpers/tablehelper /components/console/helpers/table
 /components/console/helpers/progresshelper /components/console/helpers/progressbar
+/components/console/helpers/dialoghelper /components/console/helpers/questionhelper
 /components/console/introduction /components/console
 /components/console/index /components/console
 /components/debug/class_loader /components/debug
@@ -350,11 +360,21 @@
 /components/var_dumper/index /components/var_dumper
 /components/yaml/introduction /components/yaml
 /components/yaml/index /components/yaml
+/console/logging /console
 /deployment/tools /deployment
 /install/bundles /setup/bundles
+/email/gmail /email
+/email/cloud /email
 /event_dispatcher/class_extension /event_dispatcher
 /form /forms
 /form/use_virtual_forms /form/inherit_data_option
+/frontend/assetic/apply_to_option /frontend/assetic
+/frontend/assetic/asset_management /frontend/assetic
+/frontend/assetic/jpeg_optimize /frontend/assetic
+/frontend/assetic/php /frontend/assetic
+/frontend/assetic/uglifyjs /frontend/assetic
+/frontend/assetic/yuicompressor /frontend/assetic
+/reference/configuration/assetic /frontend/assetic
 /security/target_path /security
 /service_container/third_party /service_container
 /templating/templating_service /templates

_images/translation/debug_1.png

@@ -10,7 +10,7 @@
 
     .. code-block:: xml
 
-        <!-- app/config/services.xml -->
+        <!-- config/services.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <container xmlns="http://symfony.com/schema/dic/services"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

_images/translation/debug_2.png

@@ -29,7 +29,6 @@ features.
 
 Next: :doc:`/best_practices/tests`
 
-.. _`official Assetic documentation`: https://github.com/kriswallsmith/assetic
 .. _`Webpack Encore`: https://github.com/symfony/webpack-encore
 .. _`Webpack`: https://webpack.js.org/
 .. _`official Webpack Encore documentation`: https://symfony.com/doc/current/frontend.html

_images/translation/debug_3.png

@@ -363,13 +363,13 @@ The end user can provide values in any configuration file:
 
     .. code-block:: yaml
 
-        # app/config/config.yml
+        # config/services.yaml
         parameters:
             acme_blog.author.email: 'fabien@example.com'
 
     .. code-block:: xml
 
-        <!-- app/config/config.xml -->
+        <!-- config/services.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <container xmlns="http://symfony.com/schema/dic/services"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -384,7 +384,7 @@ The end user can provide values in any configuration file:
 
     .. code-block:: php
 
-        // app/config/config.php
+        // config/services.php
         $container->setParameter('acme_blog.author.email', 'fabien@example.com');
 
 Retrieve the configuration parameters in your code from the container::

_images/translation/debug_4.png

@@ -26,7 +26,7 @@ Routing
 
 Routing is never automatically imported in Symfony. If you want to include
 the routes from any bundle, then they must be manually imported from somewhere
-in your application (e.g. ``config/routes.yml``).
+in your application (e.g. ``config/routes.yaml``).
 
 The easiest way to "override" a bundle's routing is to never import it at
 all. Instead of importing a third-party bundle's routing, simply copy
@@ -101,7 +101,7 @@ to a new validation group:
 
     .. code-block:: yaml
 
-        # src/Acme/UserBundle/Resources/config/validation.yml
+        # src/Acme/UserBundle/Resources/config/validation.yaml
         FOS\UserBundle\Model\User:
             properties:
                 plainPassword: