Merge branch '4.3' into 4.4

* 4.3:
  fixed CS
  fixed CS
  fixed CS
  Do not log or call the proxy function when the locale is the same
  Added missing required dependencies on psr/cache and psr/container in symfony/cache-contracts and symfony/service-contracts respectively.
  [HttpClient] fix closing debug stream prematurely
  [Mailer] made code more robust
  Restore compatibility with php 5.5
  fixed sender/recipients in SMTP Envelope
  collect called listeners information only once
  [HttpKernel] Remove TestEventDispatcher.

Author: fabpot

OptionsResolver.php

@@ -846,7 +846,7 @@ public function offsetGet($option/*, bool $triggerDeprecation = true*/)
             throw new AccessException('Array access is only supported within closures of lazy options and normalizers.');
         }
 
-        $triggerDeprecation = 1 === \func_num_args() || \func_get_arg(1);
+        $triggerDeprecation = 1 === \func_num_args() || func_get_arg(1);
 
         // Shortcut for resolved options
         if (isset($this->resolved[$option]) || \array_key_exists($option, $this->resolved)) {