UPGRADE FROM 6.1 to 6.2

FrameworkBundle

Deprecate the Symfony\Component\Serializer\Normalizer\ObjectNormalizer and Symfony\Component\Serializer\Normalizer\PropertyNormalizer autowiring aliases, type-hint against Symfony\Component\Serializer\Normalizer\NormalizerInterface or implement NormalizerAwareInterface instead
Deprecate AbstractController::renderForm(), use render() instead

HttpFoundation

Deprecate Request::getContentType(), use Request::getContentTypeFormat() instead

Ldap

Deprecate {username} parameter use in favour of {user_identifier}

Mailer

Deprecate the OhMySMTP transport, use MailPace instead

Security

Add maximum username length enforcement of 4096 characters in UserBadge to prevent session storage flooding
Deprecate the Symfony\Component\Security\Core\Security class and service, use Symfony\Bundle\SecurityBundle\Security\Security instead
Passing empty username or password parameter when using JsonLoginAuthenticator is not supported anymore
Add $lifetime parameter to LoginLinkHandlerInterface::createLoginLink()

Validator

Deprecate the loose e-mail validation mode, use html5 instead

Workflow

The Registry is marked as internal and should not be used directly. use a tagged locator instead
```
tagged_locator('workflow', 'name')
```
The first argument of WorkflowDumpCommand should be a ServiceLocator of all workflows indexed by names