This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
Delete bogus localhost.rev.
Add prototype localhost.rev and a script to create it automatically.
(NB to installl people: you should ask ``do you have a full-time connection
o the Internet?'', run this script, and enable named if the answer is
yes.)
