I just got my lazy ass of the chair and picked up an old laptop and compiled the minetest server on it. Compling actually took more than an hour 8).
It's running on c55.me port 30000 now again. I didn't move the old world onto it.
New players may only build in the "free-build" area which is anywhere in the negative X coordinate. Ask a moderator (jordan4ibanez, cisoun, Fixer, Saxony) to build in the "protected" positive X coordinate.
Oh, and - it is of course not running all the time when I am tinkering around and testing stuff with it.