### Other registration functions
* `minetest.register_chatcommand(cmd, chatcommand definition)`
+ * Adds definition to minetest.registered_chatcommands
* `minetest.register_privilege(name, definition)`
* `definition`: `"description text"`
* `definition`: `{ description = "description text", give_to_singleplayer = boolean}`
* Map of object references, indexed by active object id
* `minetest.luaentities`
* Map of Lua entities, indexed by active object id
+* `minetest.registered_chatcommands`
+ * Map of registered chat command definitions, indexed by name
* `minetest.registered_ores`
* List of registered ore definitions.
* `minetest.registered_biomes`