Merge branch '5.4' into 6.2

* 5.4:
  [Serializer] Handle datetime deserialization in U format
  [HttpFoundation] Fix file streaming after connection aborted
  Fix param type annotation
  [HttpClient] Fix setting duplicate-name headers when redirecting with AmpHttpClient

Author: nicolas-grekas

BinaryFileResponse.php

@@ -319,7 +319,7 @@ public function sendContent(): static
                 while ('' !== $data) {
                     $read = fwrite($out, $data);
                     if (false === $read || connection_aborted()) {
-                        break;
+                        break 2;
                     }
                     if (0 < $length) {
                         $length -= $read;