[SAMBA4][PATCH] dd client for samba 4

[tridge at samba.org]

James,

 > The attached patch implements a dd clone that can perform IO to/from CIFS
 > servers. Samba 4 folks, could you please review this before I check it in?

Would it be feasible to have this as a command inside smbclient
instead? Perhaps as source/client/dd.c ?

We have a fairly poor record of maintaining the less frequently
used command line tools in Samba, and in particular updating them with
common elements from other tools. By having less tools which can do
more I think we lower our maintainence burden.

Cheers, Tridge