Issue #2500521 by Jo Fitzgerald, RytoEX, quietone, gaurav.kapoor, hussainweb, phenaproxima: Upgrade path for Statistics 7.x and 6.x

Revert "Issue #2225681 by quietone, Jo Fitzgerald, dipakmdhrm, Adita, maxocub, Gábor Hojtsy, phenaproxima, iMiksu, Manuel Garcia, catch: Migrate D6 i18n blocks translated strings"

This reverts commit b53e50d7.

Issue #2225681 by quietone, Jo Fitzgerald, dipakmdhrm, Adita, maxocub, Gábor Hojtsy, phenaproxima, iMiksu, Manuel Garcia, catch: Migrate D6 i18n blocks translated strings

Issue #2854878 by maxocub, joelpittet, mikeryan, quietone, hansrossel, phenaproxima: Taxonomy vocabulary with name Type cannot migrate from d6 to d8

Issue #2447729 by phenaproxima, heddn: Migrate D6 user reference fields to D8 entity reference field storage config entities

Issue #2784371 by Jo Fitzgerald, quietone, phenaproxima, Gábor Hojtsy, mikeryan, jhodgdon: Migrate D6 i18n taxonomy terms

Issue #2872660 by phenaproxima: Migrate D6 node reference fields to D8 entity reference field definitions

Issue #2566779 by quietone, hussainweb, keithm, heddn, kekkis, Shawn DeArmond, Jo Fitzgerald, mlbrgl, phenaproxima, mikeryan, 13jupiters, Gábor Hojtsy: Migration D6 > D8 of CCK date fields

Issue #2665196 by rakesh.gectcr, quietone, Manuel Garcia, Jo Fitzgerald, webflo, mikeryan, phenaproxima, heddn: Migration for email fields is missing

Issue #2422229 by quietone, ultimike, vprocessor, anish.a, Jo Fitzgerald, phenaproxima: D6->D8 Core block migrations missing settings tests

Issue #2498291 by Jo Fitzgerald, neclimdul, quietone, KarenS, mikeryan, mitrpaka, phenaproxima: Fields hidden in some view modes abort migration (D6)

Issue #2687977 by claudiu.cristea, alexpott, prics: Comment::preSave() unconditionally sets hostname to client host

Issue #2225293 by maxocub, penyaskito, Gábor Hojtsy, quietone, mitrpaka, Sonal.Sangale, rvilar, phenaproxima, Ryan Weal: Migrate D6 and D7 language negotiation settings

Issue #2746293 by maxocub, Gábor Hojtsy, penyaskito: Migrate content_translation_source when migrating node translations

Issue #2716133 by quietone, kevinquillen, phenaproxima, mikeryan, Charlotte17: Roles are duplicated instead of updated existing roles

Issue #202783 by evgeny.chernyavskiy, jrdixey, YesCT, subhojit777, adinac, jeet09, gaurav_varshney, alansaviolobo, Devin Carlson, chetan2111, beanworks, phantomvish: Use a consistent name for the aggregator module throughout core

Issue #2225775 by vasi, quietone, phenaproxima, chx, penyaskito, mikeryan, esclapes, vprocessor, steinmb, Gábor Hojtsy, Marc Angles, bwinett: Migrate Drupal 6 core node translation to Drupal 8

Issue #2698083 by quietone, Sam152, Mac_Weber, vasi: D6->D8: Migrating links without leading slash leads to fatal error

Issue #2225271 by penyaskito, quietone, svendecabooter, benjy, vasi: Migrate content type language settings from Drupal 6 & 7

Issue #2676346 by alexpott, dawehner: Coding standards check on DB dump fixtures causes PHPCS to out of memory on PHP5.5 and is slow cause of huge files

Issue #2226455 by quietone, ultimike, brockfanning: Migrated URL aliases not working until nodes are re-saved

Issue #2503047 by svendecabooter, phenaproxima, quietone, mikeryan: Migrate the D6/D7 actions table to D8

Issue #2588827 by phenaproxima, neclimdul, svendecabooter, benjy, mikeryan: CCK migrations seem to have trouble with some checkbox types

Issue #2594263 by phenaproxima, neclimdul, Gábor Hojtsy, Kazanir: Add translation data to Migrate Drupal's test fixtures