INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - END TRANSACTION
        AX = C701h
Return: AL = status
            00h successful
                CX:DX = transaction number
            FDh transaction tracking disabled
            FEh transaction ended records locked
            FFh no explicit transaction active
        CF clear except when AL=FFh
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AX=C703h