Merge branch '4.4'

* 4.4:
  [Security/Http] fix typo in deprecation message
  [Security] Deprecate isGranted()/decide() on more than one attribute
  Fixed a minor typo in the UPGRADE to 5.0 guide
  Various tweaks 3.4
  Various tweaks 4.3
  [Security] Make stateful firewalls turn responses private only when needed
  [PhpUnit] Fix usleep mock return value
  Revert \"feature #33507 [WebProfiler] Deprecated intercept_redirects in 4.4 (dorumd)\"
  [TwigBundle] typo
  [TwigBundle] fix test case
  [Lock] use Predis\ClientInterface instead of Predis\Client
  Allow Twig 3
  Minor tweaks
  Fix version typo in deprecation notice
  [Form][SubmitType] Add "validate" option
  hint to the --parse-tags when parsing tags fails
  Make legacy "wrong" RFC2047 encoding apply only to one header

Author: nicolas-grekas

ClockMock.php

@@ -53,12 +53,10 @@ public static function sleep($s)
     public static function usleep($us)
     {
         if (null === self::$now) {
-            return \usleep($us);
+            \usleep($us);
+        } else {
+            self::$now += $us / 1000000;
         }
-
-        self::$now += $us / 1000000;
-
-        return null;
     }
 
     public static function microtime($asFloat = false)
@@ -127,7 +125,7 @@ function sleep(\$s)
 
 function usleep(\$us)
 {
-    return \\$self::usleep(\$us);
+    \\$self::usleep(\$us);
 }
 
 function date(\$format, \$timestamp = null)