Issue #2073531 by tim.plunkett, dawehner, Berdir, catch, plach: Use current user service instead of _account, remove _account from the request object.
Issue #2137217 by aspilicious: Remove install_time() variable get usage.
Issue #1886448 by dawehner, sun, Berdir, ParisLiakos: Rewrite the theme registry into a proper service.
Issue #2134259 by tstoeckler: Make the Simpletest XDebug integration work for CLI requests.
Issue #2137231 by aspilicious: Remove file_public_path() variable get usage.
Issue #2110845 by dawehner: Allow overriding views to override paths with parameters.
Issue #2107681 by vijaycs85, rych: Create configuration schema for RDF module.
Issue #2137729 by aspilicious: Documentation for hook_local_tasks_alter() is incorrect.
Issue #2125725 by Sweetchuck: Wrong XPath query in FieldUiTestBase.php.
Issue #2127655 by Mile23: Name space corrections
Issue #2122019 by damiankloip: Remove include_file() logic and getMenuItem() from FormBuilder.
Issue #1952394 by vijaycs85, tstoeckler, webflo, Gábor Hojtsy, Schnitzel, falcon03, YesCT, kfritsche, Ryan Weal, dagmita, likin, toddtomlinson, nonsie, Kristen Pol, dawehner, tim.plunkett, penyaskito, EclipseGC, larowlan, robertdbailey, helenkim, David Hernández, EllaTheHarpy, lazysoundsystem, juanolalla, R.Hendel, Kartagis: Add configuration translation user interface module.
Issue #2093167 by johnnydarkko, thedavidmeister, Vibjerg: Deprecate check_plain(), call \Drupal\Component\Utility\String::checkPlain() directly instead.
Issue #2118703 by Wim Leers, amateescu: Introduce #post_render_cache callback to allow for personalization without breaking the render cache.
Issue #2138133 by Gábor Hojtsy: Clean up maintainers.txt and changelog.txt for multilingual changes.
Issue #2129039 by plach, jthorson, pfrenssen, nyirocsaba, Gábor Hojtsy: Integrity constraint violation when translating body field.
Issue #2135787 by amateescu, Gábor Hojtsy, YesCT: Move static config entity local tasks to local_tasks().yml.
Issue #2137599 by segi, Sweetchuck: Incorrect type and default value for the direction of the default language.
Revert "Issue #2129039 by plach, jthorson, pfrenssen, nyirocsaba, Gábor Hojtsy: Integrity constraint violation when translating body field."

Testbot does not like this patch. Needs further investigation.

This reverts commit b0ed7570e0b9f390c105d7a4ddb6463703136881.
Issue #2129039 by plach, jthorson, pfrenssen, nyirocsaba, Gábor Hojtsy: Integrity constraint violation when translating body field.