Merge branch '4.3' into 4.4

* 4.3:
  Minor fixes
  [HttpClient] Minor fixes
  Use namespaced Phpunit classes
  [Messenger] Fixed ConsumeMessagesCommand configuration
  [Form] remove leftover int child phpdoc
  Support DateTimeInterface in IntlDateFormatter::format
  [PhpUnitBridge] fixed PHPUnit 8.3 compatibility: method handleError was renamed to __invoke
  fixed phpdocs
  Use PHPunit assertion
  [Intl] Order alpha2 to alpha3 mapping + phpdoc fixes

Author: nicolas-grekas

DependencyInjection/Configuration.php

@@ -1501,7 +1501,7 @@ private function addHttpClientSection(ArrayNodeDefinition $rootNode)
                                         ->info('A comma separated list of hosts that do not require a proxy to be reached.')
                                     ->end()
                                     ->floatNode('timeout')
-                                        ->info('Defaults to "default_socket_timeout" ini parameter.')
+                                        ->info('The idle timeout, defaults to the "default_socket_timeout" ini parameter.')
                                     ->end()
                                     ->scalarNode('bindto')
                                         ->info('A network interface name, IP address, a host name or a UNIX socket to bind to.')