DO_MODE_CHAR(REGISTERED, 'z');
DO_MODE_CHAR(LIMIT, 'l'), args_used += sprintf(args + args_used, " %d", change->new_limit);
DO_MODE_CHAR(KEY, 'k'), args_used += sprintf(args + args_used, " %s", change->new_key);
DO_MODE_CHAR(REGISTERED, 'z');
DO_MODE_CHAR(LIMIT, 'l'), args_used += sprintf(args + args_used, " %d", change->new_limit);
DO_MODE_CHAR(KEY, 'k'), args_used += sprintf(args + args_used, " %s", change->new_key);