Merge branch '3.4' into 4.3

* 3.4:
  Add missing use statement
  [Profiler] wording
  X-Accel Nginx URL updated
  ticket-30197 [Validator] Add the missing translations for the Chinese (Taiwan) ("zh_TW") locale
  Fixed test added in #35022
  Use locale_parse for computing fallback locales
  [Console] Fix filtering out identical alternatives when there is a command loader

Author: nicolas-grekas

BinaryFileResponse.php

@@ -217,7 +217,7 @@ public function prepare(Request $request)
             }
             if ('x-accel-redirect' === strtolower($type)) {
                 // Do X-Accel-Mapping substitutions.
-                // @link http://wiki.nginx.org/X-accel#X-Accel-Redirect
+                // @link https://www.nginx.com/resources/wiki/start/topics/examples/x-accel/#x-accel-redirect
                 $parts = HeaderUtils::split($request->headers->get('X-Accel-Mapping', ''), ',=');
                 foreach ($parts as $part) {
                     list($pathPrefix, $location) = $part;