Issue #1938920 by akalata, Jon Pugh, joelpittet, shanethehat, lauriii, martin107, nicholasruunu: Convert node_search_admin theme tables to table #type

Issue #2341341 by YesCT, martin107, vijaycs85, fran seva: Change public 'name' property access on languages to getName() and add back setName().

Issue #2340667 by YesCT, Pedro Lozano, alexpott, martin107: Protect Drupal\Core\Language\Language::id, and use getId().

Issue #303574 by jhodgdon, douggreen, BlakeLucchesi: Fixed Search Ranking Recency scoring algorithm.

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 #2275877 by Mixologic, duellj, Les Lim, Xano, David Strauss: Replace master/slave terminology with primary/replica.

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

Issue #2246665 by jaredsmith, martin107, YesCT, filijonka, tstoeckler: Typehint with Drupal\Core\Language\LanguageInterface instead Drupal\Core\Language\Language.

Issue #1366020 by pwolanin, dawehner, rcaracaus, jhodgdon | tstoeckler: Overhaul SearchQuery; make search redirects use GET query params for keywords.

This reverts commit 07f63fe6.

Issue #2178643 by ianthomas_uk, jhodgdon, jayeshanandani: Indexing status can show a negative percentage of content as having been indexed.

Issue #2067345 by Xano, jdillick, InternetDevels, bomoko | Berdir: Change EntityInterface type hints to NodeInterface where appropriate.

Issue #2078387 by Xano, andypost, twistor, splatio, InternetDevels, amateescu, Berdir, larowlan, vladan.me: Add an EntityOwnerInterface.

Issue #2042807 by tim.plunkett, pwolanin, ianthomas_uk, jhodgdon: Convert search plugins to use a ConfigEntity and a PluginBag.

Issue #535616 by jhodgdon, pwolanin, oriol_e9g, tgeller: Make Content Ranking settings for Search not say 'weights' to avoid confusion.

Issue #1786490 by Berdir, amateescu, damiankloip, Wim Leers, dawehner: Add caching to the state system.

Revert "Issue #1786490 by Berdir, amateescu, damiankloip, dawehner: Add caching to the state system."

This reverts commit 8ec847cc.

Issue #1998638 by damiankloip, dawehner, kim.pepper, cosmicdreams, alexpott, larowlan, Damien Tournoud: Replace almost all remaining superglobals (, , etc.) with Symfony Request object.