Merge branch '4.4'

* 4.4: (33 commits)
  [DI] fix processing of regular parameter bags by MergeExtensionConfigurationPass
  [FrameworkBundle] reset cache pools between requests
  [HttpFoundation] Accept must take the lead for Request::getPreferredFormat()
  [FrameworkBundle] Allow to use the BrowserKit assertions with Panther and API Platform's test client
  Use ConnectionRegistry instead of RegistryInterface.
  Fixes windows error
  Improving the request/response format autodetection
  [Messager] Simplified MessageBus::__construct()
  [WIP][Mailer] Overwrite envelope sender and recipients from config
  [Messenger] Added more test for MessageBus
  [Mime] Updated some PHPDoc contents
  [PropertyAccess] Adds entries to CHANGELOG and UPGRADE
  fixed typo
  [FrameworkBundle] Simplified some code in the DI configuration
  [Filesystem] added missing deprecations to UPGRADE-4.3.md
  [Filesystem] depreacte calling isAbsolutePath with a null
  Fix authentication for redis transport
  only decorate when an event dispatcher was passed
  [Messenger] Added support for auto trimming of redis streams
  [FrmaeworkBundle] More simplifications in the DI configuration
  ...

Author: nicolas-grekas

bin/simple-phpunit.php

@@ -131,7 +131,7 @@
     $prevRoot = getenv('COMPOSER_ROOT_VERSION');
     putenv("COMPOSER_ROOT_VERSION=$PHPUNIT_VERSION.99");
     // --no-suggest is not in the list to keep compat with composer 1.0, which is shipped with Ubuntu 16.04LTS
-    $exit = proc_close(proc_open("$COMPOSER install --no-dev --prefer-dist --no-progress --ansi", array(), $p, getcwd(), null, array('bypass_shell' => true)));
+    $exit = proc_close(proc_open("$COMPOSER install --no-dev --prefer-dist --no-progress --ansi", array(), $p));
     putenv('COMPOSER_ROOT_VERSION'.(false !== $prevRoot ? '='.$prevRoot : ''));
     if ($exit) {
         exit($exit);