Issue #3113971 by Spokje, mondrake, acbramley, phenaproxima, andypost, murilohp, mpdonadio, ravi.shankar, pavnish, pifagor, vladbo, JeroenT, voleger, Taran2L: Replace REQUEST_TIME in services

Issue #3415821 by alexpott: StorageComparer should not wrap sourceStorage with a memory cache if it extends \Drupal\Core\Config\FileStorage

Issue #3405574 by alexpott, borisson_: StorageComparerInterface() is missing createChangelist() and  docs for StorageComparer::addChangeList(sort_order) are wrong

Issue #3406929 by alexpott, quietone, bircher, borisson_, Wim Leers: Configuration being imported by the ConfigImporter sometimes has stale original data

Issue #3224239 by bircher, rpayanm, smustgrave: StorageComparer does not work when storages are not in the default collection

Issue #3112639 by alexpott, himmatbhatia, swatichouhan012, longwave, andypost, Hardik_Patel_12, Gábor Hojtsy, Berdir, catch: Remove all @deprecated code from config component

Issue #3086374 by mondrake, alexpott, joseph.olstad, Spokje, ravi.shankar, Gábor Hojtsy, heddn, Charlie ChX Negyesi, amateescu: Make Drupal 9 compatible with PHP 7.4

Issue #2722609 by anoopjohn, mfernea, Jo Fitzgerald, chishah92, druprad, martin107, Mile23: Fix Drupal.Commenting.FunctionComment.ParamNameNoMatch

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2451359 by alexpott: Remove the ability of collections other than the default to support configuration entities

Issue #2411689 followup by alexpott: Use a MemoryBackend in StorageComparer so that configuration import validators don't have to reread data from disk or the db

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2312093 by alexpott, yched, andypost, swentel | xjm: Rename FieldInstanceConfig to FieldConfig.

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

Issue #1808248 by alexpott, beejeebus, tayzlor, Nitesh Sethia: Add a separate module install/uninstall step to the config import process.

Issue #2224873 by alexpott: Handle a config entity with the same name but different UUID being imported.

Issue #2133325 by mtift, alexpott, sun: Create a site UUID on install and only allow config sync between sites with the same UUID.

Issue #1998576 by beejeebus, alexpott, swentel: Make the config import process use full config trees again.

Issue #1890784 by alexpott, YesCT, heyrocker, tim.plunkett, EllaTheHarpy, beejeebus: Refactor configuration import and sync functions.