INT 2F CU - NETWORK REDIRECTOR - READ FROM REMOTE FILE
        AX = 1108h
        ES:DI -> SFT
            SFT DPB field -> DPB of drive containing file
        CX = number of bytes
        SS = DOS DS
        SDA DTA field -> user buffer
Return: CF set on error
            AX = DOS error code (see INT 21/AH=59h)
        CF clear if successful
            CX = number of bytes read (0000h = end of file)
            SFT updated
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1109h,AX=1229h,INT 21/AH=3Fh,INT 21/AX=5D06h

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