INT 21 O - Novell NetWare, Alloy NTNX - LOG/LOCK RECORD (FCB)
        AH = BFh
        AL = flags
            bit 0: lock as well as log record
            bit 1: non-exclusive lock
        DS:DX -> opened FCB (see AH=0Fh)
        BX:CX = offset
        BP = lock timeout in timer ticks (1/18 sec) if AL nonzero
        SI:DI = length
Return: AL = error code (see AH=BCh)
Note:   this function was added in NetWare 4.6, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=BCh,AH=C0h"NetWare",AH=C2h"NetWare"

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