bug#47431: Process Whois connection broken by remote peer.

[Gregory Heytings]

> I don't think there's an expectation of privacy here -- the user knows 
> that doing a whois query will result in server(s) being queried.

Okay.

> So I think whois.el should be rewritten to do the two step query (and be 
> asynchronous, which should be pretty trivial).

Okay, I'll do that.