minetest.get_worldpath() -> eg. "/home/user/.minetest/world"
^ Useful for storing custom data
minetest.is_singleplayer()
+minetest.features
+^ table containing API feature flags: {foo=true, bar=true}
+minetest.has_feature(arg) -> bool, missing_features
+^ arg: string or table in format {foo=true, bar=true}
+^ missing_features: {foo=true, bar=true}
minetest.debug(line)
^ Always printed to stderr and logfile (print() is redirected here)