Issue #2110345 by mr.york, effulgentsia, Désiré, fgm, fago, pfrenssen, stefan.r, Berdir, Rajendar Reddy: Simplify validation constraint implementations for fields.

Issue #2318099 by tim.plunkett: Replace $form_state['complete_form'] with $form_state->getCompleteForm().

Issue #2301317 by pwolanin, dawehner, Wim Leers, effulgentsia, YesCT, xjm, alexpott: MenuLinkNG part4: Conversion.

Revert "Issue #2301317 by pwolanin, effulgentsia, Wim Leers, dawehner, alexpott: MenuLinkNG part4: Conversion."

This reverts commit fd2db9cd.

Issue #2301317 by pwolanin, effulgentsia, Wim Leers, dawehner, alexpott: MenuLinkNG part4: Conversion.

Issue #2078473 by blueminds | Berdir: Added Use entity access API for checking access to private files.

Issue #2149197 by penyaskito, mikey_p, vijaycs85, herom: Replace format_interval with \Drupal::service('date')->formatInterval().

Issue #658148 by bleen18, ShaunDychko, jhodgdon, g3r4, cferthorney, BBommarito, jbrauer, Cauliflower: Fixed The "access user profiles" permission is poorly named.

Issue #2216535 by jhodgdon, Berdir: Replace Node overview topic and Node API topic with Entity Hooks topic.

Issue #1987418 by joelpittet, drupalninja99, rakhimandhania, Manuel Garcia, scor, shanethehat, Cottser, LinL, LewisNyman, minneapolisdan: User.module - Convert theme_ functions to Twig.

Issue #1952064 by joshi.rohit100, yoroy, weekbeforenext, prabeen.giri, jonreid, nflowers1228, HaloFX, mparker17, paboden, babruix, sun: Shorten help text on user permissions/roles pages

Issue #2124957 by Wim Leers, catch: Replace 'content' cache tag with 'rendered' and use it sparingly.

Issue #2089331 by grom358 | thedavidmeister: [meta] Replace calls to check_plain() with Drupal\Component\Utility\String::checkPlain().

Issue #950534 by mparker17, mgifford, Mixologic, jbloomfield, erinclerico, theMusician, wmostrey | zirvap: [policy] Consistently use email instead of e-mail in Drupal.

Issue #2279635 by thedavidmeister: Fixed template_preprocess_username() should use Unicode::truncate().

Issue #2190313 by pfrenssen, Berdir, amateescu, ianthomas_uk: Add $EntityType::load() and loadMultiple() to simplify loading entities.

Issue #2183113 by jhodgdon, effulgentsia, tim.plunkett, herom, larowlan: Update hook_help signature to use route_name instead of path.

Issue #2099131 by jessebeach, Wim Leers, catch, Berdir, benjifisher, martin107, andypost: Use #pre_render pattern for entity render caching.

Issue #2228341 by sun, znerol, skipyT, ParisLiakos: Objectify session management functions + remove session.inc.

Issue #2089433 by ianthomas_uk, grom358, herom, thedavidmeister, visabhishek, longwave, Sweetchuck: Remove uses of deprecated XSS filter functions.