Issue #2161591 by pwolanin, beejeebus, sun: Change default active config from file storage to DB storage.

Issue #2239407 by holly.ross.drupal, YesCT, tstoeckler, alimac: Language manager interface should not specify implementation details for getLanguages on the interface.

Wrong commit credit.

This reverts commit 0a93d9a1.

This reverts commit 07f63fe6.

Issue #2227869 by joelpittet: Remove magic printing from Attribute class to make Twig 'without' filter work for attributes.

Issue #1399846 by slashrsm, Gábor Hojtsy, Berdir, brantwynn, visabhishek, David_Rothstein, cweagans, martin107, SteffenR, Dave Reid: Make unused file 'cleanup' configurable.

Issue #2226197 by fago, jessebeach: Introduce FieldStorageDefinitionInterface in the Entity Field API.

Issue #2233607 by visabhishek: Kill path_load() and use \Drupal::service('path.alias_storage')->load($conditions) instead.

Issue #2223611 by cs_shadow, ACF, dman, visabhishek, vintorezxxi: ContactFormController passed user name field list object to watchdog.

Issue #2206909 by jhodgdon, dawehner: Regression: Form submit redirects from 403/404 pages are no longer possible.

Issue #2217749 by Wim Leers, Jalandhar, visabhishek, damiankloip: Entity base class should provide standardized cache tags and built-in invalidation.

Issue #2212947 by sun, pwolanin, dmitry_bezer | ianthomas_uk: Installer doesn't pick up database port or table prefix from settings.php.

Issue #2225739 by killua99, Berdir, andypost, pfrenssen: Remove usage of field_info_instances(), use EntityManager::getFieldDefinitions() instead.

Issue #2124535 by Berdir, alexpott, Désiré, xjm | yched: Prevent secondary configuration creates and deletes from breaking the ConfigImporter.

Issue #2227187 by Mykhailo Gurei, Jalandhar, cs_shadow, mandar.harkare | Berdir: Stop refering to config storage as storage controller.

Issue #2228341 by sun, znerol, skipyT, ParisLiakos: Objectify session management functions + remove session.inc.

Issue #1870746 by balagan, robertdbailey, lydie, KCarlile, pixelite, fenda | YesCT: Make it obvious what reordering language list does (order in language select) and does not do (fallback detection selection).

Issue #2178643 by ianthomas_uk, jhodgdon, jayeshanandani: Indexing status can show a negative percentage of content as having been indexed.

Issue #2233929 by alexpott, Berdir: drupal_set_time_limit() should only be able to increase the time limit.

Issue #2226241 by voidberg, claudiu.cristea: Saving image field or instance with an inexistent default_image crashes.

Issue #2218655 by sun, effulgentsia, jessebeach: Core expects $theme.settings default config file to exist.

Issue #1533104 by visabhishek, bryanbraun, TravisCarden, majoely | NROTC_Webmaster: Make bartik theme pass Coder Review.