This makes it obsolete to add changes to debian/changelog. We document
  our changes in Git (3.6.x branch and other related branches). On
  release, we generate an upstream ChangeLog from Git history.

  Only on the 3.5.0.x, we continue maintaining our changes in
  debian/changelog (to be compliant with current nx-libs release workflow
  in X2Go).

  The following packaging scripts needed adaptations to this change:

    debian/roll-tarballs.sh
    debian/rules
    nx-libs.spec