Issue #3055374 by onxze, Meenakshi.g, christinlepson, joachim, longwave, alexpott: AuthenticationManager's role in setting the current user to anonymous is not clearly documented

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2490228 by damiankloip, almaudoh, martin107, clemens.tolboom, -enzo-, znerol, dawehner: Add Authentication Collector

Issue #2432585 by almaudoh, znerol, dawehner, cpj: Improve authentication manager service construction to support custom global service providers

Issue #2286971 by znerol, Berdir, almaudoh, cilefen: Remove dependency of current_user on request and authentication manager

Issue #2288911 by znerol, effulgentsia: Use route name instead of system path in user maintenance mode subscriber

Issue #2303673 by dawehner, damiankloip, effulgentsia, Fabianx: Implement stackphp; cleanup handlePageCache() and preHandle()

Issue #2250243 by dawehner, sun: Remove needless ContainerAware dependency from AuthenticationManager.

Issue #2178581 by damiankloip, penyaskito, Solthun: Add an AnonymousUserSession object in favour of using drupal_anonymous_user().

Issue #2073531 by tim.plunkett, dawehner, Berdir, catch, plach: Use current user service instead of _account, remove _account from the request object.

Issue #2052389 by pwolanin: Fixed All elements added to the Request attributes should have a _ prepended unless they come from the path.

Issue #2043781 by pwolanin: Fixed Drupal::request()->attributes->get('account') may conflict with an account object loaded from the path.

Issue #1890878 by corvus_ch, ygerasimov, berenddeboer, Crell, fubhy the cat, effulgentsia: Add modular authentication system, including Http Basic; deprecate global .