fixing smbd encrypted rpcs (data lens, alloc hints, sequence nums argh).

fixing smbd encrypted rpcs (data lens, alloc hints, sequence nums argh).

put unicode strings after SAMLOGON query regardless of whether it's
an NT mailslot or a non-NT mailslot, after having observed this behaviour
out of NT machines.
(This used to be commit c101113ec20ed0ba633e78e4ee45596cdccaf1b5)