Merge branch '6.4' into 7.0

* 6.4:
  [TwigBridge] foundation 5 layout: use form_label_content block for checkbox and radio labels
  [TwigBridge] Fix compat with Twig v3.9
  [Cache] Sync the Redis proxies with upstream
  [Doctrine Messenger] Fix support for pgsql + pgbouncer.
  [Mailer] Simplify fix
  Do not produce notice/warning when consuming from multiple transports and explicitly listed queues
  [FrameworkBundle] Check if the _route attribute exists on the request
  [Scheduler] fix documentation link
  [PropertyAccess] Fixes getValue() on an unitialized object property on a lazy ghost
  [HttpClient] Make retry strategy work again
  AssetMapper: Remove 'auto-generated' info
  [Mailer] Fix signed emails breaking the profiler
  [Mailer] [Mailgun] Fix expecting payload without tags or user variables
  [Validator] Update Spanish (es) translations
  Fix fetching data in `W3CReferenceTest` on AppVeyor
  Fix SQS visibility_timeout type
  [VarDumper] Fix serialization of stubs with null or uninitialized values

Tests/Reference/W3CReferenceTest.php

@@ -36,7 +36,7 @@ public function testElements()
         sort($referenceElements);
 
         $this->assertSame(
-            json_decode(file_get_contents(self::STANDARD_RESOURCES['elements']), true, 512, \JSON_THROW_ON_ERROR),
+            $this->getResourceData(self::STANDARD_RESOURCES['elements']),
             $referenceElements
         );
     }
@@ -48,8 +48,18 @@ public function testAttributes()
         }
 
         $this->assertSame(
-            json_decode(file_get_contents(self::STANDARD_RESOURCES['attributes']), true, 512, \JSON_THROW_ON_ERROR),
+            $this->getResourceData(self::STANDARD_RESOURCES['attributes']),
             array_keys(W3CReference::ATTRIBUTES)
         );
     }
+
+    private function getResourceData(string $resource): array
+    {
+        return json_decode(
+            file_get_contents($resource, false, stream_context_create(['ssl' => ['verify_peer' => false, 'verify_peer_name' => false]])),
+            true,
+            512,
+            \JSON_THROW_ON_ERROR
+        );
+    }
 }