Issue #2828559 by amateescu, alexpott: More random fails in UpdatePathTestBase tests: "settings.cache failed with: missing schema"

(cherry picked from commit 5e5ef246)

Issue #2545972 by alexpott, joelpittet, ericjenkins, stefan.r, Wim Leers, Cottser: Remove all code usages SafeMarkup::checkPlain() and rely more on Twig autoescaping

Issue #2451395 by dawehner, catch, fgm, David_Rothstein: drupal_get_schema()/drupal_get_complete_schema() no longer work as expected; remove them

Revert "Issue #2451395 by dawehner: drupal_get_schema()/drupal_get_complete_schema() no longer work as expected; remove them"

This reverts commit db8fa578.

Issue #2451395 by dawehner: drupal_get_schema()/drupal_get_complete_schema() no longer work as expected; remove them

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel.

Revert "Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel."

This reverts commit cda051c4.

Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel.

Issue #2045927 by herom, martin107, ianthomas_uk, Xano, michaellander, Sutharsan: Replace all drupal_alter() deprecated function calls.

Issue #2198343 by damiankloip, longwave: Convert all usages of cache() and cache_invalidate_tags() procedural functions.

Issue #2045921 by juanolalla, Xano, Sutharsan, InternetDevels, ianthomas_uk: Replace all module_invoke() deprecated function calls.

Revert "Issue #2045921 by juanolalla, Xano, Sutharsan, InternetDevels: Replace all module_invoke() deprecated function calls."

This reverts commit 98cdbfec.

Issue #2045921 by juanolalla, Xano, Sutharsan, InternetDevels: Replace all module_invoke() deprecated function calls.

Issue #2168011 by xjm, jessebeach, Damien Tournoud, znerol, Xano: Remove all 7.x to 8.x update hooks and disallow updates from the previous major version.

Issue #2169447 by damiankloip, sun, longwave: DX: Supply CacheBackendInterface::CACHE_PERMANENT as Cache::PERMANENT.

Issue #2057401 by plach, socketwench, kfritsche, Damien Tournoud: Fixed Make the node entity database schema sensible.

Issue #2089351 by thedavidmeister, meba: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in core/includes.

Revert "Issue #2057401 by plach, socketwench, kfritsche: Fixed Make the node entity database schema sensible."

HEAD broken; rolling back temporarily.

This reverts commit c72f39ad.

Issue #2057401 by plach, socketwench, kfritsche: Fixed Make the node entity database schema sensible.

Issue #1957154 by joates, ayelet_Cr, xjm | Berdir: Replace calls to drupal_container()->get('module_handler()') service with Drupal::moduleHandler().

Issue #1498674 by plach, das-peter, Schnitzel, dawehner, YesCT, attiks, Berdir, Gábor Hojtsy, Soul88, Carsten Müller: Refactor node properties to multilingual.

Issue #1827448 by RobLoach, sun, jbrown, tstoeckler: Use __DIR__ instead of DRUPAL_ROOT where possible/sensible.

Issue #1937600 by Berdir, rootatwc | webchick: Determine what services to register in the new Drupal class.

Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class.

Revert "Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class. Broke core tests after commit."

This reverts commit c80c3e18.

Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class.

Issue #1317628 by Albert Volkman, Gaelan, disasm, mjonesdinero, xjm: Clean up for API docs in include files starting with n-z

Issue #1608842 by chx, alexpott, sun, effulgentsia, beejeebus, tim.plunkett et al: Replace list of bootstrap modules, enabled modules, enabled themes, and default theme with config.

Issue #1393392 by c960657, fubhy: Convert prefix cache clears to cache tags, then remove support for them.