syncing up printing code with SAMBA_2_2 (already done some merges

syncing up printing code with SAMBA_2_2 (already done some merges
in the reverse).

  * add in new printer change notify code from SAMBA_2_2

  * add in se_map_standard() from 2.2 in _spoolss_open_printer_ex()

  * sync up the _print_queue_struct in smb.h (why did someone change the
    user/file names in fs_user/fs_file (or vice-versa) ? )

  * sync up some cli_spoolss_XXX functions
(This used to be commit 5760315c1de4033fdc22684c940f18010010924f)