INT 21 - Novell NetWare - DIRECTORY SERVICES - MODIFY MAXIMUM RIGHTS MASK
        AH = E2h subfn 04h
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status (00h,8Ch,98h,9Ch) (see AH=E2h/SF=00h)
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=0Ah,AH=E2h/SF=0Dh

Format of request buffer:
Offset  Size    Description
 00h    WORD    length of following data (max 104h)
 02h    BYTE    04h (subfunction "Modify Maximum Rights Mask")
 03h    BYTE    directory handle
 04h    BYTE    rights to grant (see AH=E2h/SF=03h)
 05h    BYTE    rights to revoke (see AH=E2h/SF=03h)
 06h    BYTE    length of directory path (00h-FFh)
 07h  N BYTEs   directory path
Note:   the rights specified at offset 05h are revoked first, and then the
          rights specified at offset 04h are added to the resulting rights
          mask

Format of reply buffer:
Offset  Size    Description
 00h    WORD    (call) 0000h (no results returned)