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.
it onto a bunch of floppies in a semi-intelligent way.
Useful for things like: tar cf - . | gzip -9 | fdwrite -d /dev/rfd0.1720 -v
Where it will keep asking for floppies until tar is done.
