Issue #2939247 by plach, hchonov: Revert Content Translation routes to act on default rather than latest revisions

(cherry picked from commit 479aa4b1)

Issue #2926412 by Wim Leers: Follow-up for #2883680: deprecation message indicates the wrong deprecation introduction version

(cherry picked from commit 2eaceaa4)

(cherry picked from commit 409b3933)

Issue #2938947 by Wim Leers, plach: Always list a "Current revision" for each available content translation

(cherry picked from commit 41116a57)

Issue #2939107 by plach, Wim Leers: Follow-up for #2924724: Clean up the node revision translation revert logic to leverage the new API

(cherry picked from commit 65388055)

Issue #2931765 by timmillwood, Wim Leers: Regression: \Drupal\hal\LinkManager\LinkManagerBase implicitly depends on REST module

(cherry picked from commit 05422f2a)

Issue #2938895 by plach, Wim Leers, hchonov, timmillwood: Make EntityConverter load the latest translation-affecting revision for translated entities

(cherry picked from commit 1708b460)

(cherry picked from commit a201fd23)

Issue #2936725 by gabesullice, Wim Leers, dawehner, Berdir: EntityDataDefinition::create() does not respect derived entity definitions

(cherry picked from commit b2b7f466)

(cherry picked from commit f69af23f)

(cherry picked from commit 7a72d35e)

Issue #2936253 by gabesullice: Clarify usage of AccountProxyInterface: recommend AccountInterface for most use cases

(cherry picked from commit 4453f44a)

(cherry picked from commit e15fce6d)

(cherry picked from commit 6a15d076)

Issue #2935137 by el7cosmos, Mixologic: License "GPL-2.0+" is a deprecated SPDX license identifier, use "GPL-2.0+-only" or "GPL-2.0+-or-later" instead

(cherry picked from commit b159de5b)

(cherry picked from commit 6a3ba025)

(cherry picked from commit d2767fd1)

Issue #2872355 by sarguna raj M, chiranjeeb2410, joachim: expand and clarify docs for DefaultPluginManager::alterInfo()

(cherry picked from commit 7925beb0aab1b51424a91292d73abf9d69a00015)

Issue #2938369 by Mohit Malik, yo30, mondrake, alexpott: The Symfony\Component\ClassLoader\WinCacheClassLoader class is deprecated

(cherry picked from commit 04419404)

Issue #2921706 by Daniel Korte, bkosborne: Update example.settings.local.php to include ['cache']['bins']['page']

(cherry picked from commit a43d80cf)

Issue #2914834 by snehi, tresti88, joachim: missing @return for drupal_get_user_timezone() and return types for other methods in bootstrap.inc

(cherry picked from commit 99b7c9f6)

(cherry picked from commit c3383951)

(cherry picked from commit 1c72ba5a)

(cherry picked from commit 14c499fc)

(cherry picked from commit e9334689)

Issue #2930542 by sahil432, sdewitt, andrewmacpherson: Disabled form labels in Seven theme's node meta-data  do not meet WCAG AA 1.4.3 Contrast (minimum)

Issue #2878556 by plach, matsbla, vijaycs85, Gábor Hojtsy, catch, gabesullice, effulgentsia, hchonov, hass, amateescu, xjm: Ensure that changes to untranslatable fields affect only one translation in pending revisions

(cherry picked from commit 27c3b40e)

Issue #2919373 by tedbow, Wim Leers, Adita, webchick, Berdir, drpal, xjm, samuel.mortenson, bircher: Prevent Settings Tray functionality for blocks that have configuration overrides

(cherry picked from commit 4e66ea20)

Issue #2891215 by plach, timmillwood, hchonov, amateescu, catch, gabesullice: Add a way to track whether a revision was default when originally created

(cherry picked from commit 49c6761b)

Issue #2937889 by larowlan, Sam152: Regression: LinkWidget no longer supports base fields with optional title

Issue #2927746 by alexpott, catch, slasher13, mpdonadio, martin107, RoSk0, jibran, larowlan, pounard, Mile23, Jo Fitzgerald, deviantintegral, pritish.kumar: Update Symfony components to 3.4.*

(cherry picked from commit 47c2dda6)

Revert "Issue #2891215 by plach, timmillwood, hchonov, amateescu, catch, gabesullice: Add a way to track whether a revision was default when originally created"

This reverts commit 9182b216.

Issue #2908952 by sahil432, martin107: drupal_get_complete_schema() and drupal_get_schema() are not completely removed

(cherry picked from commit c79d74ab)

Issue #2936793 by tim.plunkett, tstoeckler, EclipseGc: EntityReferenceItem::generateSampleValue() should create a sample entity if a referenceable entity is not found

(cherry picked from commit f724db34)