Merge branch '4.3' into 4.4

* 4.3:
  [Intl] Improve the error message when country code is wrong
  Fix tests
  [Intl][4.3] Cleanup internal api
  [HttpFoundation] Do not set X-Accel-Redirect for paths outside of X-Accel-Mapping
  bumped Symfony version to 4.2.10
  updated VERSION for 4.2.9
  updated CHANGELOG for 4.2.9
  Use AsserEquals for floating-point values

Author: nicolas-grekas

Tests/Constraints/TimezoneValidatorTest.php

@@ -76,7 +76,7 @@ public function getValidTimezones(): iterable
         yield ['PST8PDT'];
         yield ['America/Montreal'];
 
-        // expired in ICU
+        // previously expired in ICU
         yield ['Europe/Saratov'];
 
         // standard
@@ -316,6 +316,17 @@ public function getDeprecatedTimezones(): iterable
      */
     public function testIntlCompatibility()
     {
+        $reflector = new \ReflectionExtension('intl');
+        ob_start();
+        $reflector->info();
+        $output = strip_tags(ob_get_clean());
+        preg_match('/^ICU TZData version (?:=>)?(.*)$/m', $output, $matches);
+        $tzDbVersion = isset($matches[1]) ? (int) trim($matches[1]) : 0;
+
+        if (!$tzDbVersion || 2017 <= $tzDbVersion) {
+            $this->markTestSkipped('"Europe/Saratov" is expired until 2017, current version is '.$tzDbVersion);
+        }
+
         $constraint = new Timezone([
             'message' => 'myMessage',
             'intlCompatible' => true,