Get rid of the request() wrapper function, plus various other cleanups

core/includes/bootstrap.inc

core/includes/form.inc

core/includes/install.core.inc

core/lib/Drupal/Core/Language/LanguageManager.php

core/modules/aggregator/aggregator.admin.inc

core/modules/comment/comment.module

core/modules/comment/comment.pages.inc

...Drupal/language/Tests/LanguageDependencyInjectionTest.php

...es/locale/lib/Drupal/locale/Tests/LocaleUninstallTest.php

core/modules/overlay/overlay.module

core/modules/system/system.module

core/modules/system/tests/http.php

core/modules/system/tests/https.php

core/modules/user/user.pages.inc