[Mimedefang] How to use File::Scan?

[Dave Williss]

I've downloaded and installed File::Scan to use with Mimedefang.
My question is, how do I actually configure File::Scan?  the documentation
for it is sparse.
What does it use for virus definitions and how do you update it?

 -- Dave Williss
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Meddle not in the affairs of dragons,
   for you are crunchy and taste good with catsup