Issue #2620576 by cilefen, alexpott, chapf, xjm, longwave, dawehner: fnmatch() is not available on all environments (i.e QNAP QTS)

Issue #2502621 by Pravin Ajaaz, hussainweb, Peacog, jhodgdon, ivanjaros: Replace implement notes with inheritdoc tag

Issue #2304461 by dawehner, neclimdul, naveenvalecha, jibran, tim.plunkett, phenaproxima, Xano, hussainweb, sun, hitesh-jain, amateescu, alexpott, daffie, Mile23, Wim Leers, larowlan: KernelTestBaseTNG™

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #1081266 by stefan.r, mikeytown2, jeroen.b, tsphethean, mfb, joseph.olstad, marcelovani: Avoid re-scanning module directory when a filename or a module is missing

Issue #2090115 by alexpott, xjm: Don't install a module when its default configuration has unmet dependencies

Issue #2328111 by dawehner, martin107, neclimdul: Replace most instances of the DRUPAL_ROOT constant with the app.root container parameter.

Issue #2233787 by alexpott, xjm | tim.plunkett: Move default configuration into extension/config/install to clarify its purpose.

Issue #2227187 by Mykhailo Gurei, Jalandhar, cs_shadow, mandar.harkare | Berdir: Stop refering to config storage as storage controller.

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

This reverts commit ae8be3cc.

Revert "Rollback of Issue #2138239 by damiankloip, tim.plunkett, amateescu: Use GlobIterator instead of glob. — breaks testbot."

Un-committing the un-commit of the previously committed commit. :P

This reverts commit 40e903f8.

Rollback of Issue #2138239 by damiankloip, tim.plunkett, amateescu: Use GlobIterator instead of glob. — breaks testbot.

Bah. Wrong commit message.

This reverts commit 843d7d66.

Issue #2100329 by cosmicdreams: Use \Drupal instead of Drupal to make IDEs and static code analyse tools happy.

Issue #1712250 by alexpott, n3or, cam8001, vijaycs85, Albert Volkman, jibran, heyrocker, chx: Convert theme settings to configuration system.

Issue #1914366 by vijaycs85, Gábor Hojtsy, alexpott: Move all configuration schema files into a schema subdirectory.

Issue #1811372 by sdboyer: Fixed FileStorage should utilize late static binding for inheritance friendliness.