INT 21 O - Novell NetWare, Alloy NTNX - CLEAR RECORD (FCB)
        AH = C1h
        DS:DX -> opened FCB (see AH=0Fh)
        BX:CX = offset
Return: AL = error code (see AH=BCh)
Note:   unlocks record and removes it from log table
        this function was added in NetWare 4.6, but was removed some time prior
          to Advanced NetWare, and is no longer listed in current Novell
          documentation
SeeAlso: AH=BEh,AH=C0h"NetWare",AH=C4h

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