[Xymon] Struggle supporting new OSs

Hi, I have been thinking about this in a while, and I am now convinced that we should aim at a 4.4.0 release which just drops support for old libraries not available or deprecated in modern OSs/distributions. We can rename and sed the version for the current 4.4 branch, but this will ease many of the efforts which are draining our energies to keep compatibility, and at the same time if we need minor bugfixes in the 4.3 branch, we can add them for dinosaurs which still require old libraries. What do you think?

Nicola Mastodon <https://joinmastodon.org/>: @nic@mathstodon.xyz