Revert "Revert the revert of Issue #1849004 by chx, xjm: One Service Container To Rule Them All. It was innocent after all."

This reverts commit a1638b87.

This reverts commit 761ac679.

Issue #1808200 by sun: Fixed Unit test performance significantly decreased since system list config conversion.

Issue #1697256 by heyrocker, alexpott, sun, xjm, webchick: Create a UI for importing new configuration.

Issue #1821172 by spearhead93: Hash the config directory name, unhash the active and staging directory names.

Issue #1727430 by tedbow, webchick, amontero: Added 'exclusive' flag to install profiles to auto-select them during installation.

Issue #1608842 by chx, alexpott, sun, effulgentsia, beejeebus, tim.plunkett et al: Replace list of bootstrap modules, enabled modules, enabled themes, and default theme with config.

Issue #1772708 by alexpott, sun, chx, catch, beejeebus: Fixed The configuration directories can not be outside of DRUPAL_ROOT.

Revert "Issue #1772708 by alexpott: Fixed The configuration directories can not be outside of DRUPAL_ROOT."

This reverts commit e003e4c5.

Issue #1741804 by beejeebus, sun, chx, alexpott, matason: Implement a config import/staging directory.

Issue #1392208 by Gábor Hojtsy, penyaskito, David_Rothstein: Fixed Impossible to install Drupal in a non-English language when following the provided instructions.

Issue #1733746 by penyaskito, sxnc, jsbalsera, Gábor Hojtsy: Fixed D8 installer is broken if selecting a non-English language on installation.

Issue #562042 by cburschka, Rob Loach, sun, scor: Added Search for install profiles in sites/[all|site]/profiles folders, and move core profiles into /core/profiles.

- Patch #1189184 by attiks, clemens.tolboom, penyaskito, Gábor Hojtsy, Sutharsan: OOP & PSR-0-ify gettext .po file parsing and generation.

- Patch #1493098 by sun, jcisio, pcambra, Pol, wamilton, Rok Žlender, beejeebus: convert cron settings to configuration system.

Issue #1500312 by aspilicious, marcingy, sun: Create $config_directory_name() during a D7 => D8 upgrade.

- Patch #1587642 by TravisCarden, andypost: rename drupal_uninstall_modules() to module_uninstall().

Issue #1605324 by sun, Jose Reyero, alexpott, chx, Rob Loach | beejeebus: Configuration system cleanup and rearchitecture.

Revert "- Patch #1605324 by sun, Jose Reyero, alexpott, chx, Rob Loach, beejeebus: configuration system cleanup and rearchitecture."

This reverts commit 8df23c8a. Original commit
was missing some files. Trying again.

- Patch #1605324 by sun, Jose Reyero, alexpott, chx, Rob Loach, beejeebus: configuration system cleanup and rearchitecture.

Issue #445012 by David_Rothstein, sun: Prevent drupal_rewrite_settings() from overwriting customizations made to settings.php.

Issue #1617598 by Gábor Hojtsy: Fixed When installing in ie Dutch notice appears about LOCALE_NOT_CUSTOMIZED.

Issue #1470824 by alexpott, sun: Fixed XML encoder can only handle a small subset of PHP arrays, so switch to YAML.

- Patch #1183208 by effulgentsia, Niklas Fiekas, katbailey, no_commit_credit, catch: remove variable_get()('clean_url()') and switch to index.php/path pattern for dirty URL support.

Issue #1444766 by acrollet, amateescu: Determine method for automatically cleaning up configuration after a module is uninstalled.

Issue #1180112 by franz, Pedro Lozano, amateescu: Move drupal_*_schema_*() functions into one place.