* [loader] check phpio is ON no need require config.php
* [log] redefine the PHPIO_LOG api
+ [Log] save log to redis
config.php
$_PHPIO = array(
	'log' => array(
		'class' => 'PHPIO_Log_Redis',
		'save_dir' => PHPIO_TMP,
		'host' => '127.0.0.1',
		'port' => 6379,
		'auth' => '', //password
	)
);