[ticket/16955] Add missing docblocks and fix unclear ones

PHPBB3-16955

build/psalm/stubs/apcu/apcu.php

@@ -1,4 +1,15 @@
 <?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 class APCUIterator implements Iterator
 {

build/psalm/stubs/redis/redis.php

@@ -15,7 +15,5 @@
 class Redis
 {
 	public const OPT_PREFIX = 2;
-
 	public const SERIALIZER_PHP = 1;
-
 }