Issue #1067408 by alexpott, Jalandhar, jessebeach, Désiré, neetu morwani, dawehner, sun: Themes do not have an installation status.

Issue #2221695 by brantwynn, ianthomas_uk, grom358, ParisLiakos, Jalandhar: Remove uses of deprecated URL functions.

Issue #2228921 by sun: Consolidate system.module + system.theme + system.theme.disabled into core.extension config.

Issue #779482 by mikeytown2, sun, cam8001, dalin, segi, alexpott, Sweetchuck, jbrown: Installation failure when opcode cache is enabled.

Issue #2122693 by jayeshanandani, YesCT, sun, alexpott, BMDan: Installer does not work on a completely empty settings.php.

Issue #2218955 by sun: Install_profile_info() removes required module instead of profile module from dependencies.

Issue #340723 by ParisLiakos, sun, Berdir, glennpratt, Cottser, swentel, alexpott, tstoeckler, Xano, tim.plunkett, BassistJimmyJam | beejeebus: Make modules and installation profiles only require .info.yml files.

Revert "Issue #340723 by ParisLiakos, sun, Berdir, glennpratt, Cottser, swentel, tstoeckler, Xano, tim.plunkett, BassistJimmyJam: Make modules and installation profiles only require .info.yml files."

This reverts commit b4c561d0.

Issue #340723 by ParisLiakos, sun, Berdir, glennpratt, Cottser, swentel, tstoeckler, Xano, tim.plunkett, BassistJimmyJam: Make modules and installation profiles only require .info.yml files.

Issue #1351352 by sun, lucascaro, Gábor Hojtsy, rupertj: Distribution installation profiles are no longer able to override the early installer screens.

Issue #2210197 by sun, longwave, Sutharsan: Remove public access to Extension::$type, ::$name, ::$filename.

Revert "Issue #2210197 by sun, longwave: Remove public access to Extension::$type, ::$name, ::$filename." Broke 'drush en simpletest' on testbots

This reverts commit 2c51074d.

This reverts commit ae8be3cc.

Issue #2140433 by pwolanin, chx, Owen Barton, dstol, Heine, Damien Tournoud: Port SA-CORE-2013-003 to Drupal 8.

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 #2121849 by moshe weitzman: Move chmod.directory and chmod.file out of config and into settings so that file writes are independant of the config system.

Issue #2166065 by alexpott, mtift: Replace config_install_default_config with ConfigInstaller service.

Issue #2004086 by dawehner, pwolanin, katbailey, tim.plunkett, vijaycs85, fabpot: The Request service must be synthetic.

Issue #2057259 by alexpott, cweagans, swentel: Fixed Malformed modulename.info.yml file causes fatal error.

Issue #2099467 by moshe weitzman, chx: Let non-interactive installers determine mode of files directory and its subdirectories.