output of print() goes to the server log.

[fluxionary]

this partially intersects w/ #388, but i don't think it's entirely a dupe.

on public servers, having the output of print() go to the server log is worse than useless. players cannot see it, and it can clog up the log w/ a lot of spurious, unfilterable garbage.

at the very least, there should be an option to disable the output that servers can enable. if others agree on that, i can create a PR.

[Desour]

👍 It's bad that print writes into log and server terminal, even on public servers.

Suggestion: Add a setting (default false) that makes it a no-op. (Setting, and not minetest.is_singleplayer(), because users otherwise get confused on why their luacontroller doesn't work on their (local) server.)

[TurkeyMcMac]

Maybe print could call a separate function write_to_terminal after formatting its arguments. write_to_terminal would be a no-op by default, but it could be overriden by the LuaController code to write to a digiline device or something.