Fix 1998/fanf for Linux

The C pre-processing stages of the build failed in Linux so instead of
having those steps fanf.c became what was the code that was compiled.
Now it works with both macOS and Linux. This fix required changes to
fanf.c and also the Makefile.

I also removed the address from the README.md file as well.

1998/fanf/README.md

@@ -1,10 +1,6 @@
 # Most Obfuscated Translator
 
 Tony Finch
-Demon Internet
-322 Regent's Park Road
-Finchley
-London N3 2QQ
 United Kingdom
 <https://dotat.at>