multiple targets when dealing with creating a set of distribution files
from scratch. Another problem is *verifying* that a given file fetched
from its HOME_LOCATION is the one we wanted (what if the stupid ftp site
maintainer updated it in place?). Rich Morin pointed this out and suggested
some solutions. I need to think about it some more (suggestions?).
For now, we have a seperate `fetch' and `extract' target.
Submitted by: jkh
18f96a7446