UPGRADE FROM 4.x to 5.0
=======================
HttpFoundation
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* The `$size` argument of the `UploadedFile` constructor has been removed.
* The `getClientSize()` method of the `UploadedFile` class has been removed.
Security
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* The `ContextListener::setLogoutOnUserChange()` method has been removed.
SecurityBundle
* The `logout_on_user_change` firewall option has been removed.
* The `SecurityUserValueResolver` class has been removed.
Translation
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* The `FileDumper::setBackup()` method has been removed.
* The `TranslationWriter::disableBackup()` method has been removed.
Validator
* The `Email::__construct()` 'strict' property has been removed. Use 'mode'=>"strict" instead.
* Calling `EmailValidator::__construct()` method with a boolean parameter has been removed, use `EmailValidator("strict")` instead.
* Removed the `checkDNS` and `dnsMessage` options from the `Url` constraint.
Workflow
* `add` method has been removed use `addWorkflow` method in `Workflow\Registry` instead.
* `SupportStrategyInterface` has been removed, use `WorkflowSupportStrategyInterface` instead.
* `ClassInstanceSupportStrategy` has been removed, use `InstanceOfSupportStrategy` instead.