config.h.in wants to be free^Wrebuilt

[Benjamin Kosnik]

> I'm using ftp://gcc.gnu.org/pub/gcc/libstdc++/20000619-maintainer-tools.tar.gz
> but it's clearly showing its age.

Yep. Back then, this was the minimal set of autotools that worked. Now, 
it's a bit long in the tooth.  

> I'll try playing with the stock tools and see what changes.

Please let me know. Again, I don't mind standardizing on the autotools
used, since this is one of those small things that is actually getting
more annoying as time goes on. 

-benjamin