adns has some bugs, poor design and no new commit for 8 years. It'd be great if we could convince tetrix upstream not to use it :).
Another thing is that tetrix hasn't seen new release for 13 years, and tetrinet.org is dead anyway. It seems that we have games-puzzle/tetrinet that supposedly serves the same purpose. CC-ing Andrew Church since he seems involved :).
Wow, I haven't touched that code in ages ;) games-puzzle/tetrinet does indeed have a server component, though I don't know how it compares to tetrix featurewise.
CCing treecleaners then
masked for removal
dropped