Int 21 Fn F217  - Novell Netware V3+ - Clear Connection Number (logout St  [N]

   AX = F217h subfn D2h
   CX = length of request buffer in bytes
   DX = length of reply buffer in bytes
   DS:SI -> request buffer (see below)
   ES:DI -> reply buffer (ignored)

Return: AL = status
   reply buffer filled

Format of request buffer:
Offset Size    Description
 00h   WORD    0002h (length of following data)
 02h   BYTE    D2h (subfunction "Clear Connection Number")
 03h   BYTE    connection number