Issue #2509300 by dawehner, catch, larowlan: Path alias UI allows node/1 and /node/1 as system path then fatals

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #2399211 by mpdonadio, legolasbo, vijaycs85, pjonckiere, rteijeiro, jhodgdon, dawehner, yched: Support all options from views fields in DateTime formatters

Issue #2509496 by chx, benjy, phenaproxima: Make migrate process plugins more flexible/less boilerplate

Issue #2503083 by pwolanin, neclimdul: Simplify PasswordInterface so it's not coupled to UserInterface

This reverts commit 37001445.

Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, kbasarab, Tor Arne Thune, basic, pfrenssen, yannickoo, simolokid, fietserwin, bzrudi71: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)

Issue #2452577 by JeroenT, AjitS, tadityar, arpitr, dpopdan, Mile23, andypost: Remove Usage of deprecated function taxonomy_*

Issue #2460529 by alexpott, chx, phenaproxima: Migrations need to use the configuration entity dependency system

Revert "Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, Tor Arne Thune, kbasarab, pfrenssen, basic, yannickoo, simolokid: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)"

This reverts commit b105158a.

Issue #1314214 by stefan.r, phayes, ergophobe, YesCT, damienwhaley, Tor Arne Thune, kbasarab, pfrenssen, basic, yannickoo, simolokid: MySQL driver does not support full UTF-8 (emojis, asian symbols, mathematical symbols)

Issue #2466797 by mikeryan, benjy: Rename migration_groups key to avoid confusion with MigrationGroup support

Issue #2417975 by phenaproxima, benjy, chx, neclimdul: EntityFile destination incorrectly assumes temporary files are absolute paths

Issue #2383871 by mgifford, rpayanm, a_thakur, maximpodorov, AohRveTPV, jhodgdon: Spellchecking Drupal - PHP

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #2469623 by phenaproxima, ultimike, amateescu, mrjmd, douggreen, chx, benjy: Process for creating migration source DBs for automated tests

Issue #2258177 by amateescu, sun, mikeryan, bdone, dawehner, Berdir: Convert migrate_drupal tests to KernelTestBase

Issue #2448501 by ultimike, phenaproxima, benjy: Use the migrate cckfield plugin type for the link field

Issue #2161797 by boris sondagh, mfernea, arrrgh, amitgoyal: Create hook_help for migrate drupal module

Issue #2368987 by Wim Leers, Berdir, Schnitzel, epari.siva, bircher, vijaycs85, likin: Move internal page caching to a module to avoid relying on config get on runtime

Issue #2417549 by alexpott, znerol, benjy, Berdir: Drupal\migrate_drupal\Tests\d6\MigrateFileTest fail in MigrateTestBase

Issue #1897058 by disasm, rteijeiro: Replace "boolean" with "bool" when used as param/return/var type