Imported Upstream version 19.0
Merge tag 'upstream/19.0'

Upstream version 19.0

* tag 'upstream/19.0':
  Imported Upstream version 19.0
New upstream release.
Update 0001-drop-supplemental-groups.patch.
Bump Standards-Version to 3.9.5.
Remove gaoihttp.py prior to building as it's Python 3 only.
releasing version 19.0-1