Merge branch '4.4' into 5.2

* 4.4:
  [4.4] Add missing `@return` annotations
  Handle lock with long key

Author: nicolas-grekas

File/Stream.php

@@ -20,6 +20,8 @@ class Stream extends File
 {
     /**
      * {@inheritdoc}
+     *
+     * @return int|false
      */
     public function getSize()
     {