node-statsd binds to all hosts by default

[watercrossing]

When creating nodejs' dgram.Socket it is bound to all hosts by default. Is this intentional?

For public servers it might be a good idea to only bind to specific interfaces (e.g. localhost); this can be modified by calling Socket.bind.

[devdazed]

What is the main concern here? While it binds on all ports by default, it is only sending out on localhost. Additionally, would you be willing to create a pull request?