Revert "update rails on rack guide, section 2 needs to be changed or maybe deleted"

This reverts commit 7a4e545eccf834cb620df0f909ef3f4bec4e6608.

railties/guides/source/rails_on_rack.textile

@@ -89,32 +89,23 @@ $ rake middleware
 For a freshly generated Rails application, this might produce something like:
 
 <ruby>
-use ActionDispatch::Static
 use Rack::Lock
-use ActiveSupport::Cache::Strategy::LocalCache
-use Rack::Runtime
-use Rails::Rack::Logger
-use ActionDispatch::ShowExceptions
-use ActionDispatch::RemoteIp
-use Rack::Sendfile
-use ActionDispatch::Callbacks
-use ActiveRecord::ConnectionAdapters::ConnectionManagement
-use ActiveRecord::QueryCache
-use ActionDispatch::Cookies
-use ActionDispatch::Session::CookieStore
-use ActionDispatch::Flash
-use ActionDispatch::ParamsParser
+use ActionController::Failsafe
+use ActionController::Session::CookieStore, , {:secret=>"<secret>", :session_key=>"_<app>_session"}
+use Rails::Rack::Metal
+use ActionDispatch::RewindableInput
+use ActionController::ParamsParser
 use Rack::MethodOverride
-use ActionDispatch::Head
-use ActionDispatch::BestStandardsSupport
-run Blog::Application.routes
+use Rack::Head
+use ActiveRecord::QueryCache
+run ActionController::Dispatcher.new
 </ruby>
 
 Purpose of each of this middlewares is explained in the "Internal Middlewares":#internal-middleware-stack section.
 
 h4. Configuring Middleware Stack
 
-Rails provides a simple configuration interface +config.middleware+ for adding, removing and modifying the middlewares in the middleware stack via +application.rb+ or the environment specific configuration file <tt>environments/&lt;environment&gt;.rb</tt>.
+Rails provides a simple configuration interface +config.middleware+ for adding, removing and modifying the middlewares in the middleware stack via +environment.rb+ or the environment specific configuration file <tt>environments/&lt;environment&gt;.rb</tt>.
 
 h5. Adding a Middleware
 
@@ -127,7 +118,7 @@ You can add a new middleware to the middleware stack using any of the following
 * <tt>config.middleware.insert_after(existing_middleware, new_middleware, args)</tt> - Adds the new middleware after the specified existing middleware in the middleware stack.
 
 <ruby>
-# config/application.rb
+# config/environment.rb
 
 # Push Rack::BounceFavicon at the bottom
 config.middleware.use Rack::BounceFavicon
@@ -142,7 +133,7 @@ h5. Swapping a Middleware
 You can swap an existing middleware in the middleware stack using +config.middleware.swap+.
 
 <ruby>
-# config/application.rb
+# config/environment.rb
 
 # Replace ActionController::Failsafe with Lifo::Failsafe
 config.middleware.swap ActionController::Failsafe, Lifo::Failsafe
@@ -207,7 +198,7 @@ The following shows how to replace use +Rack::Builder+ instead of the Rails supp
 <strong>Clear the existing Rails middleware stack</strong>
 
 <ruby>
-# application.rb
+# environment.rb
 config.middleware.clear
 </ruby>