makehistory -a

[Jeffrey M. Vinocur]

I tried `makehistory -a` in CURRENT, and it didn't appear to work (that 
is, it looks like we started rebuilding into a fresh history file).  A 
quick look at the source reveals:

        int flags = HIS_RDWR | HIS_CREAT | HIS_INCORE;

        if (!AppendMode)
            flags |= HIS_CREAT;

and while I don't know exactly what the semantics of HISopen() are 
supposed to be, I think there must be a bug above.  Perhaps HIS_CREAT 
shouldn't be in the initial flags= line?

-- 
Jeffrey M. Vinocur
jeff at litech.org