[Mimedefang] Filter configuration help required

[Rob MacGregor]

I'm looking for advice/examples on how to change MD's configuration so
that if only one of my AV scanners fails (as in, doesn't work), but
the other works, the message isn't tempfailed.

The reason?  We'll I've just moved from clamav 0.90 to 0.90.1 and I'm
finding it silently crashing at random intervals.  I don't want mail
delayed while I try and find the cause.

Thanks

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Rob MacGregor
      Whoever fights monsters should see to it that in the process he
        doesn't become a monster.                  Friedrich Nietzsche