Merge branch '8.x' of git.drupal.org:project/drupal into 8.x

core/includes/bootstrap.inc

core/includes/cache.inc

core/includes/install.core.inc

core/lib/Drupal/Component/README.txt

core/lib/Drupal/Core/Cache/CacheBackendInterface.php

core/lib/Drupal/Core/Cache/DatabaseBackend.php

core/lib/Drupal/Core/Cache/InstallBackend.php

core/lib/Drupal/Core/Cache/NullBackend.php

core/lib/Drupal/Core/README.txt

core/lib/README.txt

core/modules/search/search-rtl.css

core/modules/search/search.css

core/modules/search/search.info

core/tests/README.txt

core/vendor/README.txt

...Symfony/Component/ClassLoader/ApcUniversalClassLoader.php

...r/Symfony/Component/ClassLoader/ClassCollectionLoader.php

...mfony/Component/ClassLoader/DebugUniversalClassLoader.php

core/vendor/Symfony/Component/ClassLoader/LICENSE

core/vendor/Symfony/Component/ClassLoader/MapClassLoader.php