void database_deinit(); // close database
bool database_load_block(MapBlock *block); // load a block from map database (initializes state, mgs buffer and data), returns false on failure
void database_save_block(MapBlock *block); // save a block to database
+bool database_load_meta(const char *key, s64 *value_ptr); // load a meta entry
+void database_save_meta(const char *key, s64 value); // save / update a meta entry
bool database_load_player(char *name, v3f64 *pos_ptr); // load player data from database
void database_create_player(char *name, v3f64 pos); // insert new player into database
void database_update_player_pos(char *name, v3f64 pos); // update player position