[ticket/security/231] Disable remote avatar functionality & add warning

SECURITY-231

phpBB/phpbb/db/migration/data/v32x/disable_remote_avatar.php

@@ -0,0 +1,34 @@
+<?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.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+use phpbb\db\migration\migration;
+
+class disable_remote_avatar extends migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v325',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('allow_avatar_remote', '0')),
+			array('config.update', array('allow_avatar_remote_upload', '0')),
+		);
+	}
+}