Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/http-kernel/HttpCache/EsiResponseCacheStrategyInterface.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * This code is partially based on the Rack-Cache library by Ryan Tomayko,
+ * which is released under the MIT license.
+ * (based on commit 02d2b48d75bcb63cf1c0c7149c077ad256542801)
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\HttpCache;
+
+/**
+ * ResponseCacheStrategyInterface implementations know how to compute the
+ * Response cache HTTP header based on the different response cache headers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since version 2.6, to be removed in 3.0. Use ResponseCacheStrategyInterface instead.
+ */
+interface EsiResponseCacheStrategyInterface extends ResponseCacheStrategyInterface
+{
+}