On the way to Samba 4, week 46

Really not much time to work on Samba this week. So I didn't get around to really debug the failing echo test for quite a while. Then tridge pointed out that I was trying to use a connected UDP socket as if it was not connected, and things started to work like a charm. It doesn't look like I'll have much more time during week 47. Hopefully I will get around to clean up the patches and push my example anyway.