[HttpFoundation] Documented public properties.
Merge branch '2.3' into 2.4

* 2.3:
  bumped Symfony version to 2.3.10
  updated VERSION for 2.3.9
  update CONTRIBUTORS for 2.3.9
  updated CHANGELOG for 2.3.9
  Add support SAPI cli-server
  Fix hardcoded listenerTag name in error message
  [HttpFoundation] Documented public properties.
  [Routing] add missing unit tests for Route and RouteCollection classes

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php
	src/Symfony/Component/Routing/Tests/RouteCollectionTest.php
Merge branch '2.4'

* 2.4:
  Revert "bug #9601 [Routing] Remove usage of deprecated _scheme requirement (Danez)"
  bumped Symfony version to 2.4.2
  updated VERSION for 2.4.1
  updated CHANGELOG for 2.4.1
  bumped Symfony version to 2.3.10
  updated VERSION for 2.3.9
  update CONTRIBUTORS for 2.3.9
  updated CHANGELOG for 2.3.9
  Add support SAPI cli-server
  Fix hardcoded listenerTag name in error message
  [HttpFoundation] Documented public properties.
  [Routing] add missing unit tests for Route and RouteCollection classes

Conflicts:
	src/Symfony/Component/HttpKernel/DependencyInjection/RegisterListenersPass.php
	src/Symfony/Component/HttpKernel/Kernel.php