Comment 18 for bug 1568459

So this whole bug is clearly just a packaging problem! The old compiled binaries still run on newer Ubuntu machines, so the easiest step to fix this bug is to simply add those old binaries to the unison-all and unison-all-gtk packages, which currently are empty and useless.

It would be nice to also backport the latest Unison to the old systems, but presumably that would be more work.