Merge branch '6.4' into 7.0

* 6.4: (23 commits)
  fix merge
  add missing return type-hints
  fix merge
  explicitly mark nullable parameters as nullable
  fix low deps tests
  [HttpKernel] Fix datacollector caster for reference object property
  [Serializer] Fixing PHP warning in the ObjectNormalizer with MaxDepth enabled
  bug #51578 [Cache] always select database for persistent redis connections
  [Security] Validate that CSRF token in form login is string similar to username/password
  [Serializer] Use explicit nullable type
  [validator] validated Dutch translation
  Improve dutch translations
  [Translation] Skip state=needs-translation entries only when source == target
  [HttpKernel] Ensure controllers are not lazy
  [Validator] Fill in trans-unit id 113: This URL does not contain a TLD.
  [Validator] added missing Polish translation for unit 113
  [Validator] add missing lv translation
  [HttpClient] Let curl handle transfer encoding
  [Messenger] Make Doctrine connection ignore unrelated tables on setup
  [HttpFoundation] Set content-type header in RedirectResponse
  ...

Author: xabbuh

RedirectResponse.php

@@ -85,6 +85,7 @@ public function setTargetUrl(string $url): static
 </html>', htmlspecialchars($url, \ENT_QUOTES, 'UTF-8')));
 
         $this->headers->set('Location', $url);
+        $this->headers->set('Content-Type', 'text/html; charset=utf-8');
 
         return $this;
     }

Tests/RedirectResponseTest.php

@@ -44,6 +44,13 @@ public function testGenerateLocationHeader()
         $this->assertEquals('foo.bar', $response->headers->get('Location'));
     }
 
+    public function testGenerateContentTypeHeader()
+    {
+        $response = new RedirectResponse('foo.bar');
+
+        $this->assertSame('text/html; charset=utf-8', $response->headers->get('Content-Type'));
+    }
+
     public function testGetTargetUrl()
     {
         $response = new RedirectResponse('foo.bar');