properly use ipv6 config when starting proxy, adds extra keys to exam…

…pleProxyConfig.

exampleProxyConfig.js

@@ -3,6 +3,8 @@
 Required Variables:
 
   port:             StatsD Cluster Proxy listening port [default: 8125]
+  mgmt_port:        StatsD Cluster Proxy telnet management port [default: 8126]
+  mgmt_address:     address to run the management TCP interface on [default: 0.0.0.0]
   nodes:            list of StatsD instances
      host:          address of an instance of StatsD
      port:          port that this instance is listening on
@@ -30,9 +32,9 @@ nodes: [
 {host: '127.0.0.1', port: 8131, adminport: 8132}
 ],
 server: './servers/udp',
-
 host:  '0.0.0.0',
 port: 8125,
+mgmt_port: 8126,
 forkCount: 0,
 checkInterval: 1000,
 cacheSize: 10000

proxy.js

@@ -21,8 +21,8 @@ var l;  // logger
 
 configlib.configFile(process.argv[2], function (conf, oldConfig) {
   config = conf;
-  var udp_version = config.udp_version
-    ,       nodes = config.nodes;
+  var udp_version = config.address_ipv6 ? 'udp6' : 'udp4';
+  var nodes = config.nodes;
   l = new logger.Logger(config.log || {});
 
   var forkCount = config.forkCount;
@@ -134,7 +134,6 @@ configlib.configFile(process.argv[2], function (conf, oldConfig) {
         }
       }
     });
-
     var client = dgram.createSocket(udp_version);
     // Listen for the send message, and process the metric key and msg
     packet.on('send', function(key, msg) {
@@ -152,9 +151,6 @@ configlib.configFile(process.argv[2], function (conf, oldConfig) {
       }
     });
 
-    // Bind the listening udp server to the configured port and host
-    server.bind(config.port, config.host || undefined);
-
     mgmt_server.start(
       config,
       function(cmd, parameters, stream) {