(cherry picked from commit ee9a37e3)

Issue #3103529 by alexpott, mcdruid, Chris Burge, greg.1.anderson, rfay, anavarre, catch, Gábor Hojtsy: Drupal 8.8.1+ and 9 can fail to install in the web browser due to cache pollution

Issue #3118832 by effulgentsia, alexpott, daffie: Allow custom database drivers to extend and have the same name as the core ones

Issue #3105925 by kiamlaluno: The description of the arguments for FieldDefinition::setDisplayOptions() conflicts with what reported in FieldDefinitionInterface::getDisplayOptions()

Issue #3119445 by kiamlaluno, Deepthi kumari: The documentation comment for BanIpManager::__construct() says it constructs the BanSubscriber

Issue #3115005 by bnjmnm: Remove fieldset CSS that was only there to work around a now-fixed Firefox bug

(cherry picked from commit c81afb88)

Issue #3118581 by kiamlaluno: The documentation for Crypt::randomBytesBase64() is wrong about the output length

Issue #3105701 by tedbow, xjm, Gábor Hojtsy, Krzysztof Domański, dww, Wim Leers, jungle: Do not allow core: 9.x in info.yml files

Issue #2999549 by mtift, Daniel Korte, mherchel, alexpott, larowlan: Allow button tag in LinkGenerator for better accessibility

Issue #2550717 by mradcliffe, bnjmnm, finnsky, Manuel Garcia, lauriii, longwave, tedbow, silesky, catch, xjm, droplet, johndevman, nod_, marassa: [JS] Replace jQuery.cookie with JS-cookie and provide a BC layer

Issue #2966856 by Gábor Hojtsy, quietone, alexpott, vuil, catch, heddn: Hide and disable Drupal Migrate Multilingual

Revert "Issue #3103529 by mcdruid, alexpott, Chris Burge, greg.1.anderson, rfay, anavarre, Gábor Hojtsy: Drupal 8.8.1+ and 9 can fail to install in the web browser due to cache pollution"

This reverts commit 8a23417a.

Issue #3078671 by alexpott, Simon Peacock, greg.1.anderson, vuil, jungle, rodrigoaguilera, sam-elayyoub, mmjvb, karolrybak, catch: Pin behat/mink and behat/mink-selenium2-driver to use resolvable release

Issue #2986452 by alexpott, andypost, kostyashupenko, daffie, kriboogh, larowlan, kristiaanvandeneynde, chrisrockwell, bleen, nevergone: Database reserved keywords need to be quoted as per the ANSI standard. Also resolves https://www.drupal.org/project/drupal/issues/371

Issue #3103529 by mcdruid, alexpott, Chris Burge, greg.1.anderson, rfay, anavarre, Gábor Hojtsy: Drupal 8.8.1+ and 9 can fail to install in the web browser due to cache pollution

Issue #3114909 by hchonov, ravi.shankar, alexpott: Inconsistency between EntityTypeInterface ::getHandlerClass() and ::hasHandlerClass()

Revert "Issue #3113403 by Beakerboy, daffie: Make Drupal\Core\Database\Query\Condition driver overridable"

This reverts commit 7a943a3b.

Issue #3114041 by swatichouhan012, longwave, chr.fritsch, alexpott, mondrake: PhpUnit 8 tests breaking because of compatibility issue with setUp()

Issue #3113211 by bnjmnm, lauriii, xjm: Create test for theme asset decoupling from Stable and address any regressions that decoupling may cause

Issue #2746541 by quietone, alexpott, maxocub, Wim Leers, mikelutz, jofitz, masipila, firewaller, Madhura BK, Gábor Hojtsy, catch, heddn, plach, hchonov: Migrate D6 and D7 node revision translations to D8

Issue #2865416 by owenpm3, swatichouhan012, neelam_wadhwani, cilefen: Root README.txt installation profile section links to D7 docs

Issue #3119017 by Gábor Hojtsy, effulgentsia, catch, daffie: Tests fail with MariaDB 10.2.7, but not 10.3.22

Issue #3118477 by mondrake, Mile23: RegistryTest, RegistryLegacyTest both define the same class, use mock instead

Issue #3078671 by Simon Peacock, greg.1.anderson, vuil, alexpott, jungle, rodrigoaguilera, sam-elayyoub, mmjvb, karolrybak: Pin behat/mink and behat/mink-selenium2-driver to use resolvable release

Issue #3106666 by catch, jungle, xjm, alexpott, tim.plunkett, Berdir: Remove post updates added prior to 8.8.0

Issue #3043471 by longwave, catch, Wim Leers, xjm: Replace the DiactorosFactory message factory in symfony/psr-http-message-bridge with a PSR-17 compliant message factory

Issue #3118998 by katherined, neelam_wadhwani, phenaproxima, effulgentsia: Remove null default for $memory_cache in entity storage handler constructors

Issue #3118439 by kiamlaluno: PrivateKey::__construct() describes itself as "Constructs the token generator."

Issue #3010378 by benjifisher, piotrkonefal: BookManager::buildItems() is slow because it loads nodes

Issue #2821525 by bnjmnm, chrisrockwell, tedbow, alexpott, droplet, lauriii, DyanneNova, effulgentsia, xjm, joelpittet, Cottser, andrewmacpherson: Update normalize.css to the most recent version

Issue #3098475 by Berdir, catch, TravisCarden, xjm, benjifisher, alexpott, larowlan, webchick, dww: Add more strict checking of hook_update_last_removed() and better explanation

Issue #2917600 by tedbow, alexpott, catch, anthonyf, xjm, andypost, Alan D., moshe weitzman, Berdir: update_fix_compatibility() puts sites into unrecoverable state