vpopmail 4.8a Upgrade

[Andrew Hill]

I'm trying to upgrade vpopmail to version 4.8a. However, when I try to
./configure, I get an error that the tcprules program cannot be found.

Thing is, I don't think I needed to specify this when I installed
vpopmail 3.4, and can't find tcprules anywhere on my system.

Where should tcprules be coming from? What installation am I missing?

TIA,
-- 

Andrew Hill