Issue #3054821 by mr.baileys, wiifm, sime, angrytoast, pobster, smustgrave, RichardGaunt, alexpott, Wim Leers, quietone, Berdir, neclimdul, acbramley: Include Cache-Control header on 301 redirects

Issue #3192487 by andypost, murilohp, Gábor Hojtsy, daffie, pobster, apaderno: Warn about upcoming JSON database support requirement in Drupal 9

Issue #2957953 by alexpott, sleitner, pobster, Berdir, mohit_aghera, kishor_kolekar, joegraduate, trackleft2, bappa.sarkar, acbramley, ankithashetty, paulocs, batkor, dhirendra.mishra, seanB, priyanka.sahni, Abhijith S, chetanbharambe, vikashsoni, anmolgoyal74, Webbeh, larowlan, hudri, ryan.gibson, amietpatial, ddhuri, capysara, runeasgar, saranya ashokkumar, shimpy, nikitagupta: Editing menus user-experience has regressed

Issue #3066801 by catch, WidgetsBurritos, pobster, jungle, tim.plunkett, xjm, dww, alexpott, webchick, benjifisher, longwave, worldlinemine, lauriii, Berdir: Add hook_removed_post_updates()

Issue #2073467 by maxocub, Jo Fitzgerald, pobster, masipila, plach, heddn, phenaproxima: Migrate Drupal 7 Entity Translation settings to Drupal 8