Merge branch '4.4' into 5.0

* 4.4:
  Custom User Checker, AuthenticationException is allowed

Author: javiereguiluz

security/user_checkers.rst

@@ -16,7 +16,8 @@ User checkers are classes that must implement the
 defines two methods called ``checkPreAuth()`` and ``checkPostAuth()`` to
 perform checks before and after user authentication. If one or more conditions
 are not met, an exception should be thrown which extends the
-:class:`Symfony\\Component\\Security\\Core\\Exception\\AccountStatusException`::
+:class:`Symfony\\Component\\Security\\Core\\Exception\\AccountStatusException`
+or :class:`Symfony\\Component\\Security\\Core\\Exception\\AuthenticationException`::
 
     namespace App\Security;