Milter-greylist

> I suspect it should be initialized to DKIM_NOSIG, so that we get this 
> result when there is no signature.

I thought that might be the case, however it doesn't explain what
is going on with dkim_verify when it sees a dkim header. 

I'll try pushing a signed message through when DKIM_NOSIG is set. I 
suspect that dkim_verify will not change priv_dkimstat and it will still 
end up as NOSIG.

John