Adding statsd aggregator written in node.js

This code is a little rough but useful in it's current form. I was
asked specifically to commit this as is.

tools/statsd_aggr.js

@@ -0,0 +1,92 @@
+/*
+var cli = require('cli');
+cli.parse({
+	'thresh' : ['', 'The mtu threshold', 'integer', 1400],
+	'timeout': ['', 'The interval to drain_buffer', 'integer', 1000],
+	'rhost': ['', 'The remote host', 'string', ''],
+	'rport': ['', 'The remote port', 'integer', 8125],
+	'lhost': ['', 'The local host', 'string', '127.0.0.1'],
+	'rport': ['', 'The local port', 'string', 8125],
+});
+var thresh = cli.options.thresh;
+var timeout = cli.options.timeout;
+var rhost = cli.options.rhost;
+var rport = cli.options.rport;
+var lhost = cli.options.lhost;
+var lport = cli.options.lport;
+*/
+
+var thresh = 1432; // 1500 - 68
+//var thresh = 8932; // 9000 - 68
+var timeout = 1000;
+var rhost = '';
+var rport = 8125;
+var lhost = '127.0.0.1';
+var lport = 8125;
+
+var dgram = require('dgram');
+var buf = new Buffer(thresh);
+var length = 0;
+var timeoutId;
+var client = dgram.createSocket('udp4');
+
+function drain_buffer(event)
+{
+    if (event != 'time')
+    {
+        clearTimeout(timeoutId);
+    }
+
+    if (length > 0)
+    {
+        client.send(buf, 0, length, rport, rhost);
+        length = 0;
+    }
+
+    timeoutId = setTimeout(drain_buffer, timeout, 'time');
+}
+
+function handle_packet(msg, rinfo)
+{
+    if (msg.length >= thresh)
+    {
+     	client.send(msg, 0, msg.length, rport, rhost);
+        return;
+    }
+
+    if (length > 0)
+    {
+     	if (msg.length + length + 1 <= thresh)
+        {
+            buf.write('\n', length++);
+        }
+	else
+	{
+            if (msg.length < length)
+            {
+             	drain_buffer('full');
+            }
+            else
+            {
+             	client.send(msg, 0, msg.length, rport, rhost);
+                return;
+            }
+	}
+    }
+
+    msg.copy(buf, length);
+    length += msg.length;
+}
+
+function handle_exit()
+{
+    server.close();
+    drain_buffer('exit');
+}
+
+var server = dgram.createSocket('udp4', handle_packet);
+timeoutId = setTimeout(drain_buffer, timeout, 'time');
+server.bind(lport, lhost);
+process.on('exit', handle_exit);
+process.on('SIGINT', process.exit);
+process.on('SIGTERM', process.exit);