* 4.4: (24 commits)
  [Console] Command::execute() should always return int - deprecate returning null
  [FrameworkBundle] Fix wrong returned status code in ConfigDebugCommand
  [AnnotationCacheWarmer] add RedirectController to annotation cache
  [WebProfilerBundle] Try to display the most useful panel by default
  Add note about deprecating the XmlEncoder::TYPE_CASE_ATTRIBUTES constant in the upgrade guide
  fix merge
  [DI] add tests loading calls with returns-clone
  [DI] dont mandate a class on inline services with a factory
  Fixed Redis Sentinel usage when only one Sentinel specified
  [EventDispatcher] Added tests for aliased events.
  Sync Twig templateExists behaviors
  Fix the :only-of-type pseudo class selector
  Deprecate the XmlEncoder::TYPE_CASE_ATTRIBUTES constant
  [Mailer] Tweak some code
  [Serializer] Add CsvEncoder tests for PHP 7.4
  Copy phpunit.xsd to a predictable path
  [WebserverBundle] Remove duplicated deprecation message
  remove duplicated test
  [Security/Http] fix parsing X509 emailAddress
  [FrameworkBundle] conflict with VarDumper < 4.4
  ...