🚀 go-pugleaf

I was just checking out gnuchess 4.0 PL 67 and noticed there's about 200 more
signed char variables (what used to be just char under PL 66). Even argv is
now declared as a signed char ** !! The problem with this is that ANSI compilers
will spew out a warning for every one of these signed char problems, which
is most distracting. I see that PL 67 is a new version by Mike McGann [I noticed
that the Makefile changed significantly too] - where I had 2 compiler warnings
with PL 66 on an HP-UX 9.01 system which were easily fixable, I now have
approximately 300 (I lost count to be honest).

More news about this when I work out how to get rid of these warnings...

P.S. doc/README looks like a commercial advert to me for a PC chess program. Is
     this suitable for inclusion in a GNU piece of software ?

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