Issue #2268761 by tim.plunkett: Remove support for function-based forms.
Issue #2072897 by jayeshanandani, marcingy, herom, er.pushpinderrana, inket: Modernize contact.module forms.
Issue #2303605 by cilefen: Rename *.menu_links.yml to *.links.menu.yml files to improve DX.
Issue #2298319 by Berdir | ivanjaros: Fixed views.display.block.allow should be a sequence not a boolean.
Issue #2226063 by Berdir, plopesc: Merge ListBooleanItem from options module into BooleanItem.
Issue #2073759 by mondrake, fietserwin, claudiu.cristea: Convert toolkit operations to plugins.
Issue #2285189 by Jose Reyero, Gábor Hojtsy: Fixed Undefined config schema type should not be explicitly used in config schemas.
Issue #2301715 by drunken monkey: Fixed search_excerpt() uses strrpos() incorrectly.
Issue #2303823 by tim.plunkett, jmolivas: Remove service definition for controller.entityform from core/core.services.yml.
Issue #2304999 by martin107:  ConfigTranslationFormAccess @file annotation needs updating.
Issue #2304801 by pwolanin: Fixed Missing @param in UrlGenerator for request stack.
Issue #2304965 by longwave | klausi: Fixed Port form_select_options() XSS fix from SA-CORE-2014-003.
Issue #2276219 by Wim Leers: Asset libraries should declare their license.
Issue #1825952 by Fabianx, joelpittet, bdragon, heddn, chx, xjm, pwolanin, mikey_p, ti2m, bfr, dags, cilefen, scor, mgifford: Turn on twig autoescape by default
Issue #2294083 by ParisLiakos: Remove usages of module_uninstall().
Issue #597236 by Berdir, catch, msonnabaum, Xano, Wim Leers, jhedstrom, amateescu, corvus_ch, swentel, moshe weitzman, Gábor Hojtsy, riccardoR, killes@www.drop.org, et al: Add entity caching to core.
START PART 3: https://www.drupal.org/node/2301313
apply patch https://www.drupal.org/files/issues/menu-2256521-MenuLinkContentUI-review-do-not-test.patch
rename updateLink to updateDefinition
Part 3: 2301313 Cleaned up MenuLinkFormInterface
Part 3: 2301313 Added one extra line in doc block in MenuLinkFormInterface.php