SA-CORE-2019-002 by greggles, cashwilliams, EclipseGc, larowlan, samuel.mortenson, alexpott, tedbow, effulgentsia, Fabianx, xjm, mlhess

Issue #3015992 by Krzysztof Domański, alexpott, larowlan: Not affecting spacing in PhpTransliterationTest

(cherry picked from commit a09ce775)

Issue #2998769 by kiamlaluno, quietone, kkalaskar: @see directive used in the wrong place outputs the wrong HTML markup

(cherry picked from commit 6d98f6bf)

Issue #3000677 by catch, Shane Birley, featherbelly, alexpott, larowlan: Fatal error after upgrade to 8.6x [due to regression in extension system]

Issue #2955457 by pfrenssen, Chewie, unrealauk, alexpott, Pol: ConfigFactory static cache gets polluted with data from config overrides

Issue #3020142 by mglaman, tim.plunkett: Test module no_transitions_css has invalid hook_page_attachments

(cherry picked from commit c00be4c4)

Issue #3007973 by tim.plunkett, lukasss, xopoc, bnjmnm, stompersly: Layout builder prevents the rendering of extra fields (like Links) on pages not using Layout Builder

(cherry picked from commit fea6c512)

Issue #3024259 by Pol, alexpott: [PHP 7.3] Fix EnvironmentTest::providerTestCheckMemoryLimit() notice

(cherry picked from commit e57c4a13)

(cherry picked from commit 95b3b178)

Issue #2978922 by brathbone, philipnorton42, msankhala, hardikpandya, alexpott, siliconmeadow: Improve batch_process() documentation

(cherry picked from commit 34b94c8c)

Issue #2845975 by quietone, Jo Fitzgerald, aleevas, maxocub, Gábor Hojtsy: Migrate Drupal 6 user profile field value option translations

(cherry picked from commit 75a42131)

Issue #2701829 by alexpott, andypost, Soul88, Graber, Eduardo Morales, dawehner, pingwin4eg, catch, Berdir, jibran, httang12: Extension objects should not implement \Serializable

Issue #2693727 by mikelutz, sanduhrs, CalebD, ajlib, Lendude, tstoeckler, catch: Limiting options for exposed Language filters causes errors and doesn't work for special languages

(cherry picked from commit 0b6c398e)

Issue #3023402 by alexpott: \Drupal\Tests\Component\Datetime\DateTimePlusTest fails on latest PHP7.3 build

(cherry picked from commit 6a888784fc2bed9ea6f315fec4f0f63f3376f64f)

Issue #3001997 by Krzysztof Domański, scott_euser, alexpott: Transliteration a string containing an unknown character (e.g. 0x80) is not valid

(cherry picked from commit f9e7921b)

Issue #3018942 by welly, alexpott, jibran, Krzysztof Domański, floydm: Domain URL language detection - InvalidArgumentException: The user-entered string must begin with a '/', '?', or '#'

(cherry picked from commit 79e94b49)

(cherry picked from commit 60574dd0)

This reverts commit 12173dcf.

Issue #3022183 by wengerk, benjifisher: Fix BlockContentAccessHandlerTest::providerTestAccess wrong coverage by early return

(cherry picked from commit 30fb2237)

Issue #2984072 by vijaycs85, Lendude, ApacheEx, dawehner: System: Convert ErrorHandlerTest to phpunit

(cherry picked from commit bda5967e)

Issue #3019706 by hchonov, alexpott, sheanhoxie, jibran, dawehner: Functional JS Tests are broken if XDEBUG_CONFIG is set as an env variable

(cherry picked from commit 32dfb620)

Revert "Issue #3019706 by hchonov, jibran: Functional JS Tests are broken if XDEBUG_CONFIG is set as an env variable"

This reverts commit 14fa028c.

(cherry picked from commit 29d53e51)

Issue #3019706 by hchonov, jibran: Functional JS Tests are broken if XDEBUG_CONFIG is set as an env variable

(cherry picked from commit 6248e44d)

(cherry picked from commit 994e7ec7)

Issue #2939908 by kjay, steveparks, spitzialist, cferthorney, danharper, Eli-T: Add an article to Umami - Dairy-free chocolate

(cherry picked from commit f864e1b6)

Issue #3007439 by tim.plunkett, Wim Leers, xopoc: Layout builder renders Book navigation block on non-book pages

(cherry picked from commit 8bf6ee38)

Issue #2927768 by justinlevi, Lendude, pritish.kumar, Wim Leers, dawehner: Update RestRegisterUserTest to use the ResourceTestBase base class instead of the deprecated RESTTestBase

(cherry picked from commit 47817754)

(cherry picked from commit b4297ade)

Issue #3020579 by catch: TypeError: Argument 3 passed to Symfony\Component\HttpKernel\Event\FilterResponseEvent::__construct() must be of the type integer, string given [Symfony 4]

(cherry picked from commit 96ef9952)

(cherry picked from commit 46f02154)

Issue #2865344 by mpdonadio, Lendude, mbovan, organicwire, alexpott, jibran, jhedstrom, bobemoe, Berdir, larowlan: Exposed date filters 'empty' and 'not empty' are broken

(cherry picked from commit 8e3bcf48)

Issue #2974274 by mitrpaka, RumyanaRuseva, joachim: exception message for unrecognized source IDs in lookupDestinationIds() should have more detail

(cherry picked from commit aa577bef)

Issue #2809305 by Upchuk, Pavan B S, Jo Fitzgerald, tim.plunkett, Berdir: Block Context assignment form element shows even if no options are available

(cherry picked from commit 55f13aac)

(cherry picked from commit a9472244bf827f1e6549e9edb6997bd508d4bd16)