sync the conf file

@@ -87,10 +87,10 @@ stats {
     # the index of device ip.
     # we may retrieve more than one network device.
     # default: 0
-    network    0;
+    network         0;
     # the device name to stat the disk iops.
     # ignore the device of /proc/diskstats if not configed.
-    disk sda sdb xvda xvdb;
+    disk            sda sdb xvda xvdb;
 }
 
 #############################################################################################

@@ -11,7 +11,8 @@ heartbeat {
     summaries       on;
 }
 stats {
-    network    0;
+    network         0;
+    disk            sda sdb xvda xvdb;
 }
 vhost __defaultVhost__ {
 }