Issue #2497693 by marvin_B8, joshi.rohit100, borisson_, Crell: Add PSR-7 to Symfony Response View listener

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #2463009 by Wim Leers: Introduce CacheableResponseInterface: consolidate ways of setting X-Drupal-Cache-Tags/Contexts headers

Issue #2458349 by Wim Leers: Route's access result's cacheability not applied to the response's cacheability

Issue #2363139 by Wim Leers, dawehner, larowlan: _content controllers may only return render arrays, not strings.

Issue #2328411 by dawehner, geerlingguy, herom: Convert all permissions to yml files and permission callbacks.

Issue #2322809 by chx, dawehner, tim.plunkett: Tighten routing security by access checking in matchRequest.

Issue #2222719 by effulgentsia, tim.plunkett, xjm, dawehner: Use parameter matching via reflection for access checks instead of pulling variables from request attributes.

Issue #2158571 by tstoeckler, dawehner, kgoel, tim.plunkett, catch, effulgentsia: Routes added in RouteSubscribers cannot be altered.

Issue #2180109 by damiankloip, dawehner, ParisLiakos, joelpittet, MartijnBraam, Xano: Change the current_user service to a proxy.

Issue #2185831 by tim.plunkett: Split up ParamConverterManager and stop throwing NotFoundHttpException.

Issue #2110501 by tim.plunkett, pwolanin, tstoeckler: ControllerBase should implement ContainerInjectionInterface like FormBase.

Issue #2068471 by dawehner, Crell, tim.plunkett, jibran, fubhy, larowlan: Normalize Controller/View-listener behavior with a Page object.

Issue #2109035 by tim.plunkett, damiankloip, dawehner, chx: Make access checkers (much) easier to find.

Issue #2102417 by damiankloip, dawehner: Change Drupal\Core\Routing\RouteBuildEvent::getModule() to getProvider().

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

Issue #2048223 by dawehner, ParisLiakos, herom, fubhy, damiankloip, vijaycs85, joelpittet, tim.plunkett: Add $account argument to AccessCheckInterface::access() method and use the current_user() service.

Issue #2067809 by Berdir, damiankloip: Fixed YamlDiscovery uses basename of directory instead of module name.