r20225: we can't use composite_error() in a _recv() function, as that would

r20225: we can't use composite_error() in a _recv() function, as that would
trigger the caller to call the _recv() function again and will be an endless
loop.

this is just a fix the to prevent this, and use a more usefull error code
than NT_STATUS_UNSUCCESSFUL

I think we should move the checks about valid responses into the function
which receives the the response (here continue_name_found()),
so that the _recv() function only needs to transfer the output vars to the caller
without any logic to analyse the network response.

metze
(This used to be commit c02048f4800fe14e975f1cf0b5bd45f14261ac18)