-> Entirely new method of allocating IP space; which should
hopefully reduce the amount of messiness in allocations.
-> IP address processing provided by NetAddr::IP rather than
homebrew code
-> Change DB to PostgreSQL to eliminate some of the problems
caused by using MySQL, and to gain native RDBMS support for
IP addresses.
-> Using NetAddr::IP and Postgres allows (eventually, with
PG >= 7.4) IPV6 without any code changes. In theory.
-> Logging so that if someone makes a change that turns out
to have been wrong for some reason, Blame Can Be Assigned.
-> General code cleanups (split IPDB.pm from CommonWeb.pm,
for instance)