Experiment: gcc and doxygen

[Joe Buck]

> In case people are not interested in learning how to fish for themselves,
> Phil and I have uploaded the doxygen generated docs to:
> 
> http://www.nondot.org/gcc/

OK, you've convinced me, forget the fishing lessons.  It's nice to have
this in one place on the web, if the load is tolerable for whoever serves
it.  Thanks.

> Note that these were generated against a Feb 5th GCC tree, so they are
> slightly out of date, but hopefully they are still useful.  If there is
> interest, I might set up some scripts to pull a nightly tree and
> regenerate the documentation automatically.

It would be nice if this were kept reasonably current.