r942: If using DOS error codes, we need to return ERRDOS/ERRbadpath for chkpth even

r942: If using DOS error codes, we need to return ERRDOS/ERRbadpath for chkpth even
if only the last component failed. I'm not sure if all the other cases of
NT_STATUS_OBJECT_NAME_NOT_FOUND also need to be fixed, this at least helps
with 'copy test1.txt test2.txt' from DOS within a subdirectory.

Yes, I do have someone who needs this :-)

Jeremy, could you take a look at this?

Thanks,

Volker