Added an option to configure the hostname manually. And there was a problem when APC wasn't present.

include/poller.php

@@ -30,6 +30,9 @@ function poller_run(&$argv, &$argc){
 	load_config('config');
 	load_config('system');
 
+	if ($hostname =  get_config('system', 'hostname'))
+		$a->set_hostname($hostname);
+
 	$maxsysload = intval(get_config('system','maxloadavg'));
 	if($maxsysload < 1)
 		$maxsysload = 50;