Merge branch '3.4' into 4.3

* 3.4:
  chown and chgrp should also accept int as owner and group
  Fix RememberMe with null password
  [Validator] Fix plurals for sr_Latn (Serbian language written in latin script) validation messages
  [PhpUnitBridge][SymfonyTestsListenerTrait] Remove some unneeded code
  fix PHP const mapping keys using the inline notation
  Fix that no-cache requires positive validation with the origin, even for fresh responses

Author: fabpot

RememberMe/TokenBasedRememberMeServices.php

@@ -91,10 +91,10 @@ protected function onLoginSuccess(Request $request, Response $response, TokenInt
     /**
      * Generates the cookie value.
      *
-     * @param string $class
-     * @param string $username The username
-     * @param int    $expires  The Unix timestamp when the cookie expires
-     * @param string $password The encoded password
+     * @param string      $class
+     * @param string      $username The username
+     * @param int         $expires  The Unix timestamp when the cookie expires
+     * @param string|null $password The encoded password
      *
      * @return string
      */
@@ -113,10 +113,10 @@ protected function generateCookieValue($class, $username, $expires, $password)
     /**
      * Generates a hash for the cookie to ensure it is not being tampered with.
      *
-     * @param string $class
-     * @param string $username The username
-     * @param int    $expires  The Unix timestamp when the cookie expires
-     * @param string $password The encoded password
+     * @param string      $class
+     * @param string      $username The username
+     * @param int         $expires  The Unix timestamp when the cookie expires
+     * @param string|null $password The encoded password
      *
      * @return string
      */