* interpreters/s9/s9.c: ! import from http://www.t3x.org/s9fes/index.html
and s9fes-2007.tgz
* include/stdio.h: for s9
* lib_unix/libstdio/: put back, for s9
* interpreters/s9/s9.c: compiles natively!
* copyright.txt: update to handle s9