Ding, dong, Wirebird::Config is dead. 

I somewhat lazily stuck all the config information in a customized
library (that still identified itself as "package Wirebird;") that just
stuffed all the config variables (and constants) for each domain. 

I've now pulled in Config::ApacheFormat, and all those config variables
(and constants) are now bits of a config object. 

This will go along with using Daemon::Generic to turn the mail
monitoring critters into proper daemons that actually pay attention to
signals and such, so that I can (1) reload the config when I need to,
and (2) have procmail signal them when new mail comes in, instead of
polling the mailboxes every N minutes. 

Not that cleaning up past laziness indicates I have nothing to do in
the current stuff, just that it was annoying me. I still haven't even
gotten mailboxes going here, which is kind of an important feature...