- added support for our client library to not negotiate nt status codes, controlled

- added support for our client library to not negotiate nt status codes, controlled
  with 'nt status support' option.

- make nt_errstr() display nice strings for dos status codes encoded
  using NT_STATUS_DOS()

- no longer map between dos and nt status codes in the client library,
  instead return using NT_STATUS_DOS()

- fixed the RAW-CONTEXT test to look for
  NT_STATUS_DOS(ERRSRV, ERRbaduid) instead of NT_STATUS_INVALID_HANDLE

git-svn-id: svn+ssh://svn.samba.org/data/svn/samba/branches/SAMBA_4_0@8104 0c0555d6-39d7-0310-84fc-f1cc0bd64818