updated CHANGELOG for 2.3.21
update CONTRIBUTORS for 2.3.21
updated VERSION for 2.3.21
bumped Symfony version to 2.3.22
Improved the phpdoc for security token classes
[Security][listener] change priority of switchuser
minor #12310 Improved the phpdoc for security token classes (stof)

This PR was merged into the 2.3 branch.

Discussion
----------

Improved the phpdoc for security token classes

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

This will avoid to have Scrutinizer complaining that we pass an array of string rather than an array of RoleInterface for instance.

Commits
-------

7b6d115 Improved the phpdoc for security token classes
bug #12313 [Security][listener] change priority of switchuser (aitboudad)

This PR was merged into the 2.3 branch.

Discussion
----------

[Security][listener] change priority of switchuser

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| License       | MIT

Hi,
I have the following users:
  - Manager: Allowed to access to (/admin) and has a role ROLE_ALLOWED_TO_SWITCH
  - Partner: Allowed to access to (/partner)

When I attempt to switch to partner user I get "Access denied", well I think the switchuser listener must be registred before access listener.

Commits
-------

5f8047d [Security][listener] change priority of switchuser
Break infinite loop while resolving aliases
bug #12316 Break infinite loop while resolving aliases (chx)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #12316).

Discussion
----------

Break infinite loop while resolving aliases

| Q             | A
| ------------- | ---
| Bug fix?      | [yes]
| New feature?  | [no]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | []
| License       | MIT
| Doc PR        | []

Commits
-------

acbde50 Break infinite loop while resolving aliases
Remove aligned '=>' and '='
minor #12293 Remove aligned '=>' and '=' (disquedur)

This PR was squashed before being merged into the 2.3 branch (closes #12293).

Discussion
----------

Remove aligned '=>' and '='

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | [https://github.com/symfony/symfony/issues/12284]
| License       | MIT

Could you said to me if i should make an other PR for 2.5 branch.

Commits
-------

51312d3 Remove aligned '=>' and '='
Merge branch '2.3' into 2.5

* 2.3:
  Remove aligned '=>' and '='
  Break infinite loop while resolving aliases
  [Security][listener] change priority of switchuser
  Improved the phpdoc for security token classes
  bumped Symfony version to 2.3.22
  updated VERSION for 2.3.21
  update CONTRIBUTORS for 2.3.21
  updated CHANGELOG for 2.3.21

Conflicts:
	src/Symfony/Bridge/Propel1/Form/ChoiceList/ModelChoiceList.php
	src/Symfony/Bridge/Propel1/Form/Type/ModelType.php
	src/Symfony/Bridge/Propel1/Logger/PropelLogger.php
	src/Symfony/Bridge/Propel1/Tests/Fixtures/ItemQuery.php
	src/Symfony/Bundle/FrameworkBundle/Command/RouterDebugCommand.php
	src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
	src/Symfony/Bundle/FrameworkBundle/Translation/Translator.php
	src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
	src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LocalizedController.php
	src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LoginController.php
	src/Symfony/Component/Console/Descriptor/JsonDescriptor.php
	src/Symfony/Component/Console/Formatter/OutputFormatterStyle.php
	src/Symfony/Component/Console/Helper/ProgressHelper.php
	src/Symfony/Component/Debug/ErrorHandler.php
	src/Symfony/Component/DependencyInjection/Container.php
	src/Symfony/Component/Finder/Shell/Command.php
	src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
	src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
	src/Symfony/Component/Form/Extension/Core/Type/FormType.php
	src/Symfony/Component/Form/Extension/Core/Type/IntegerType.php
	src/Symfony/Component/Form/Extension/Core/Type/NumberType.php
	src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php
	src/Symfony/Component/HttpFoundation/File/UploadedFile.php
	src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
	src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php
	src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
	src/Symfony/Component/HttpKernel/Kernel.php
	src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php
	src/Symfony/Component/HttpKernel/Tests/HttpCache/TestMultipleHttpKernel.php
	src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
	src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php
	src/Symfony/Component/Routing/Route.php
	src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php
	src/Symfony/Component/Security/Tests/Core/Validator/Constraints/UserPasswordValidatorTest.php
	src/Symfony/Component/Templating/PhpEngine.php
	src/Symfony/Component/Validator/Constraints/ImageValidator.php
	src/Symfony/Component/Validator/Constraints/TypeValidator.php