Milter-greylist

> I understand that the 4.3.8 is a development snapshot
> but is that so trivially broken?

So I found the bug.
I would be surprised that even one people could use the spamd feature
of the current development version (4.3.8) without fixing that issue.
There was a double accounting in the variable priv->priv_msgcount
which has leaded to incorrect Content-length: field value provided to
spamd.

The patch which fixes that issue is attached.