Socket identification key

[Jarl André" <jarl.andre at gmail.com>]

> I don't know why but for some reason this did not come to my
> mind. LOL

Its a bit embarassing really because I work with Java every day 
and memory reference is a core feature. But I think the SocketSet 
buzzed my brain making me think that it gave me different objects 
or something. But anyway, lets forget this mumbo jumbo question.

I have updated my 
https://github.com/jarlah/d2-simple-socket-server with stateful 
overridable socket handlers, and to make it able to quickly setup 
the server I added a default one.

So, I think my brain is straight again now. Just got a bit messed 
up by the api.