INT 21 - Novell NetWare v3+ - GET CONNECTION INFORMATION
        AX = F217h subfn 1Ch
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status
        reply buffer filled

Format of request buffer:
Offset  Size    Description
 00h    WORD    0005h (length of following data)
 02h    BYTE    1Ch (subfunction "Get Connection Information")
 03h    DWORD   target connection number
Note:   connection numbers greater than the maximum supported by the server
          can cause ABENDs

Format of reply buffer:
Offset  Size    Description
 00h    DWORD   (big-endian) unique user ID, 00000000h if no one logged in
 04h    WORD    (big-endian) user type
 06h 48 BYTEs   user name
 36h  7 BYTEs   login time (see below)
 3Dh    BYTE    reserved

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