INT 21 - Novell NetWare - DIRECTORY SERVICES - RENAME DIRECTORY
        AH = E2h subfn 0Fh
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status (00h,8Bh,9Bh,9Ch,9Eh) (see AH=E2h/SF=00h)
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
        directories SYS:LOGIN, SYS:MAIL, and SYS:PUBLIC must not be renamed
SeeAlso: AH=E2h/SF=0Ah,AH=E2h/SF=0Bh

Format of request buffer:
Offset  Size    Description
 00h    WORD    length of following data (max 111h)
 02h    BYTE    0Fh (subfunction "Rename Directory")
 03h    BYTE    directory handle
 04h    BYTE    length of directory path (00h-FFh)
 05h  N BYTEs   directory path
        BYTE    length of new directory name (01h-0Eh)
      N BYTEs   new directory name

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