r20338: Restructure open_directory a bit. This gets rid of a race condition regarding

r20338: Restructure open_directory a bit. This gets rid of a race condition regarding
error messages: We relied upon a stat that a directory did not exist to later
on then do the mkdir or not. This does the mkdir directly and copes with a
potential error.

The second one is more important: It's possible with Samba 3 to do a
ntcreate&x with NTCREATEX_OPTIONS_DIRECTORY and we happily do a NT_STATUS_OK.

Also move up the use_nt_status() logic a bit. I think this does not belong
into the core routines, the smb server as such should take care of it.

Jeremy, do you think this should go to 3.0.24?

I'll update samba4torture when the build farm has picked up this checkin.

Volker