Merge branch '3.4' into 4.4

* 3.4:
  [Http Foundation] Fix clear cookie samesite
  [Security] Check if firewall is stateless before checking for session/previous session
  [Form] Support customized intl php.ini settings
  [Security] Remember me: allow to set the samesite cookie flag
  [Debug] fix for PHP 7.3.16+/7.4.4+
  [Validator] Backport translations
  Prevent warning in proc_open()

ResponseHeaderBag.php

@@ -252,10 +252,13 @@ public function getCookies($format = self::COOKIES_FLAT)
      * @param string $domain
      * @param bool   $secure
      * @param bool   $httpOnly
+     * @param string $sameSite
      */
-    public function clearCookie($name, $path = '/', $domain = null, $secure = false, $httpOnly = true)
+    public function clearCookie($name, $path = '/', $domain = null, $secure = false, $httpOnly = true/*, $sameSite = null*/)
     {
-        $this->setCookie(new Cookie($name, null, 1, $path, $domain, $secure, $httpOnly, false, null));
+        $sameSite = \func_num_args() > 5 ? func_get_arg(5) : null;
+
+        $this->setCookie(new Cookie($name, null, 1, $path, $domain, $secure, $httpOnly, false, $sameSite));
     }
 
     /**

Tests/ResponseHeaderBagTest.php

@@ -128,6 +128,14 @@ public function testClearCookieSecureNotHttpOnly()
         $this->assertSetCookieHeader('foo=deleted; expires='.gmdate('D, d-M-Y H:i:s T', time() - 31536001).'; Max-Age=0; path=/; secure', $bag);
     }
 
+    public function testClearCookieSamesite()
+    {
+        $bag = new ResponseHeaderBag([]);
+
+        $bag->clearCookie('foo', '/', null, true, false, 'none');
+        $this->assertSetCookieHeader('foo=deleted; expires='.gmdate('D, d-M-Y H:i:s T', time() - 31536001).'; Max-Age=0; path=/; secure; samesite=none', $bag);
+    }
+
     public function testReplace()
     {
         $bag = new ResponseHeaderBag([]);