Hi,
I maintain the
official Debian/Ubuntu packages and fully agree with you. The
packaging files simply need updating to work for Ubuntu 14.04 and above. I think that copying the updated package metadata from Ubuntu 14.04 distro packages is the easiest path forward. As Ubuntu 14.04 has a fairly up-to-date OpenVPN as-is (2.3.2) and there's nothing
really important in later 2.3.x releases I haven't yet done this.
The packaging files are in the
sbuild_wrapper repository and I'll happily accept pull requests if someone manages to fix this before I do. I don't need updated packages, because I can build updated ones trivially.