Issue #2605726 by edxxu, rakesh.gectcr: Wrong @return doc for \Drupal\Core\DrupalKernel::getModuleFileNames()

(cherry picked from commit a20c8c4f)

This reverts commit 991e1433.

Issue #2605388 by rakesh.gectcr, anil280988, mahavir003, aneeshthankachan: Comment Typos in DrupalKernel.php

Issue #2497243 by Fabianx, znerol, fgm, Wim Leers, darol100, jhedstrom, hussainweb, pfrenssen, neclimdul, jibran, Nitesh Sethia, dawehner, chx, catch, benjy, Aki Tendo: Replace Symfony container with a Drupal one, stored in cache

Issue #2304461 by dawehner, neclimdul, naveenvalecha, jibran, tim.plunkett, phenaproxima, Xano, hussainweb, sun, hitesh-jain, amateescu, alexpott, daffie, Mile23, Wim Leers, larowlan: KernelTestBaseTNG™

Issue #2529514 by dawehner, Fabianx, Wim Leers: Replace system.filter::protocols with container parameters

Issue #2528292 by Fabianx, dawehner: Decouple Error testing from relying on a cached on disk-container that is created by a different Kernel

Issue #2493665 by Fabianx, dawehner, msonnabaum, catch: Add centralized container invalidation method

Issue #2408371 by dawehner, Fabianx, alexpott, bforchhammer: Proxies of module interfaces don't work

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

Issue #2507509 by catch, dawehner: Service changes should not result in fatal errors between patch or minor releases

Issue #2410019 by alexpott, dstelljes: DrupalKernel::findSitePath() incorrectly reports directories for sites on nonstandard ports

Issue #2478119 by znerol, andypost: Replace references to Session Manager with references to Session

Issue #2389811 by znerol, mpdonadio, alexpott, hussainweb, neclimdul: Move all the logic out of index.php (again)

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #2474047 by arturogarrido, ejabrown, mikeburrelljr, acrosman, lauriii, pwolanin, dawehner: Remove Timer from DrupalKernel

Issue #2395143 by amateescu, Fabianx, Berdir, beejeebus, dashaforbes, alexpott, larowlan, znerol, dawehner, catch, neclimdul, yched, fgm, effulgentsia: YAML parsing is very slow, cache it with FileCache

Issue #2474909 by alexpott, mpdonadio, znerol, catch, Wim Leers, Berdir: Allow Simpletest to use the same APC user cache prefix so that tests can share the classmap and other cache objects

Revert "Issue #2395143 by amateescu, Fabianx, Berdir, beejeebus, dashaforbes, larowlan, dawehner, catch, alexpott, neclimdul, yched, znerol, fgm, effulgentsia: YAML parsing is very slow, cache it with FileCache"

This reverts commit 4192117d.

This reverts commit bfcb41bf.

Issue #2474817 by znerol: DrupalKernel::classLoader not updated when switching to apcu either through settings.php or automatically

Issue #2395143 by amateescu, Fabianx, Berdir, beejeebus, dashaforbes, larowlan, dawehner, catch, alexpott, neclimdul, yched, znerol, fgm, effulgentsia: YAML parsing is very slow, cache it with FileCache

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

Issue #2417075 by tstoeckler, David4514, dawehner, sachbearbeiter, mpdonadio: Trusted host verification is incompatible with URIs with the "internal" scheme