UPGRADE FROM 4.0 to 4.1
=======================

HttpFoundation
--------------

 * Passing the file size to the constructor of the `UploadedFile` class is deprecated and won't be
   supported anymore in 5.0.

 * The `getClientSize()` method of the `UploadedFile` class is deprecated. Use `getSize()` instead.

Security
--------

 * The `ContextListener::setLogoutOnUserChange()` method is deprecated and will be removed in 5.0.

SecurityBundle
--------------

 * The `logout_on_user_change` firewall option is deprecated and will be removed in 5.0.

Translation
-----------

 * The `FileDumper::setBackup()` method is deprecated and will be removed in 5.0.
 * The `TranslationWriter::disableBackup()` method is deprecated and will be removed in 5.0.

Validator
--------

 * The `Email::__construct()` 'strict' property is deprecated and will be removed in 5.0. Use 'mode'=>"strict" instead.
 * Calling `EmailValidator::__construct()` method with a boolean parameter is deprecated and will be removed in 5.0, use `EmailValidator("strict")` instead.
 * Deprecated the `checkDNS` and `dnsMessage` options of the `Url` constraint. They will be removed in 5.0.

Workflow
--------

 * Deprecated the `add` method in favor of the `addWorkflow` method in `Workflow\Registry`.
 * Deprecated `SupportStrategyInterface` in favor of `WorkflowSupportStrategyInterface`.
 * Deprecated the class `ClassInstanceSupportStrategy` in favor of the class `InstanceOfSupportStrategy`.