[Mailman-Developers] suggestion for configure

Add a --with-fqdn and --with-url or equivalent. The current cvs snapshot can't guess my fqdn on my production box, and it's used now to build a web of interconnected addresses, as well as populate the VIRTUAL_HOSTS table, so I had to do a bunch of deleting and repairing in mm_cfg. I can, if I *remember*, which I've already forgotten once, fix it when I build by setting FQDN and URL environment variables, so that configure picks those up by default, but I have a habit of just looking at config.status to see how I ran configure the last time. Having an explicit configure switch would be nice.