Thanks, but that isn't really my question. Yes, we've looked at completely
overhauling our existing imaging infrastructure to avoid a bug with DHCP
autoconfiguration edge cases. That may be the route we go, but that is not
a trivial amount of work. The debian-installer FAQ declares that it was
designed with modularity and support for edge cases, as well as giving more
control to more experienced users. What I'm trying to do should not be
complicated. It's literally just executing another script before attempting
to download a debconf file to make sure it has an IP address from the DHCP
server. I wouldn't even need to do that if network autoconfig didn't
forcibly release all existing DHCP leases on a system when it starts.