Change into the src directory, edit the Makefile, making the standard
changes.  One or two changes are commented.

Type 'make config;make', and hopefully it'll all work first time!

Note that make config is not optional, and due to a flaw in my makefile's
logic, you'll have to run it every time you change your setup (well, only
if unistd.h or ulimit.h get added or removed, but the feature may be extended
in the future..).

So far, I've only got it to work on Linux and Sun, X11R5.  If you get
it working on any other platform, send me the modified machine.h and Makefile
('cos they're the only files you should need to change).
