Merge branch '5.2' into 5.x

* 5.2:
  fixed parser
  Fixed bugs found by psalm
  [FrameworkBundle] Dont store cache misses on warmup
  fix test
  Update references to the ContainerConfigurator
  [Translation] Remove file added back from a bad merge
  Fix sleep value
  [Cache] skip storing failure-to-save as misses in ArrayAdapter
  [Validator] Delete obsolete statement in Regex::getHtmlPattern() phpDoc
  [FrameworkBundle] Remove author comments for configuration and extension
  [Stopwatch] Document new "name" property of StopwatchEvent
  [DependencyInjection] Fix "url" env var processor behavior when the url has no path
  Fixed support for nodes not extending BaseNode
  [FrameworkBundle] dont access the container to configure http_cache
  add missing queue_name to find(id) in doctrine messenger transport
  [Config][FrameworkBundle] Hint to use PHP 8+ or to install Annotations to use attributes/annots
  [Serializer] AbstractNormalizer force null for non-optional nullable constructor parameter denormalization when not present in input

Author: nicolas-grekas

Request.php

@@ -1599,7 +1599,7 @@ public function toArray()
      */
     public function getETags()
     {
-        return preg_split('/\s*,\s*/', $this->headers->get('if_none_match'), null, \PREG_SPLIT_NO_EMPTY);
+        return preg_split('/\s*,\s*/', $this->headers->get('if_none_match'), -1, \PREG_SPLIT_NO_EMPTY);
     }
 
     /**