Merge branch '4.4'

* 4.4:
  [ErrorRenderer] FlattenException cannot be final
  Fixing issue where worker-only middleware were run in all contexts
  [Messenger] Removing "sync" transport and replacing it with much nicer config trick
  Use port 465 for SES SMTP transport
  [DI] made the `%env(base64:...)%` processor able to decode base64url
  [VarDumper] improve displaying cut closures
  Set ReturnType of LockFactory to LockInterface
  [EventDispatcher] handle lazy-callable invokable

Author: nicolas-grekas

Amazon/Transport/SesSmtpTransport.php

@@ -25,7 +25,7 @@ class SesSmtpTransport extends EsmtpTransport
      */
     public function __construct(string $username, string $password, string $region = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
     {
-        parent::__construct(sprintf('email-smtp.%s.amazonaws.com', $region ?: 'eu-west-1'), 587, true, $dispatcher, $logger);
+        parent::__construct(sprintf('email-smtp.%s.amazonaws.com', $region ?: 'eu-west-1'), 465, true, $dispatcher, $logger);
 
         $this->setUsername($username);
         $this->setPassword($password);

SesSmtpTransport.php

@@ -25,7 +25,7 @@ class SesSmtpTransport extends EsmtpTransport
      */
     public function __construct(string $username, string $password, string $region = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
     {
-        parent::__construct(sprintf('email-smtp.%s.amazonaws.com', $region ?: 'eu-west-1'), 587, true, $dispatcher, $logger);
+        parent::__construct(sprintf('email-smtp.%s.amazonaws.com', $region ?: 'eu-west-1'), 465, true, $dispatcher, $logger);
 
         $this->setUsername($username);
         $this->setPassword($password);