refine full conf

@@ -43,6 +43,9 @@ max_connections     1000;
 # default: on
 daemon              on;
 
+#############################################################################################
+# heartbeat/stats sections
+#############################################################################################
 # heartbeat to api server
 # @remark, the ip report to server, is retrieve from system stat,
 #       which need the config item stats.network_device_index.
@@ -74,6 +77,19 @@ heartbeat {
     summaries       off;
 }
 
+# system statistics section.
+# the main cycle will retrieve the system stat,
+# for example, the cpu/mem/network/disk-io data,
+# the http api, for instance, /api/v1/summaries will show these data.
+# @remark the heartbeat depends on the network_device_index,
+#       for example, the eth0 maybe the device which index is 0.
+stats {
+    # the index of device ip.
+    # we may retrieve more than one network device.
+    # default: 0
+    network_device_index    0;
+}
+
 #############################################################################################
 # HTTP sections
 #############################################################################################
@@ -114,19 +130,6 @@ http_stream {
     dir             ./objs/nginx/html;
 }
 
-# system statistics section.
-# the main cycle will retrieve the system stat,
-# for example, the cpu/mem/network/disk-io data,
-# the http api, for instance, /api/v1/summaries will show these data.
-# @remark the heartbeat depends on the network_device_index,
-#       for example, the eth0 maybe the device which index is 0.
-stats {
-    # the index of device ip.
-    # we may retrieve more than one network device.
-    # default: 0
-    network_device_index    0;
-}
-
 #############################################################################################
 # RTMP/HTTP VHOST sections
 #############################################################################################