This is 'customize rule' in Kloxo-MR. Example, when we copy php53-fpm-pool.conf.tpl to custom.php53-fpm-pool.conf.tpl and then run fixphpfpm/fixweb, Kloxo-MR will be process custom.php53-fpm-pool.conf.tpl rather than php53-fpm-pool.conf.tpl. It's because when we update Kloxo-MR, php53-fpm-pool.conf.tpl will be overwrite by Kloxo-MR update.
That it.