Changes for the Linux version of goban:

I fixed up a couple of files so the source would compile under Linux
without touching the original source as much as possible. I modified
sg.h and node.c. I was fickled as whether to modify the files or 
the Makefile. I opted for minor pre-processor directives (#ifdef
_GNU_SOURCE). Whether this was the best approach is inevitably
debatable. But it works. Send any flames to dev/null.

Randy Hootman
rph@netcom.com
