[rfc] Simplified XML parsing

[Nathan Sidwell]

Daniel Jacobowitz wrote:

> This patch rewrites the memory-map parser, dividing it into an
> infrastructure and a set of tables and action functions.  The bulk of the
> parser now looks like this:

Great!

> Any thoughts on this patch?  Nathan, could you take a quick look at the
> header and see if I stripped out something I ought to have left in?

I couldn't see anything wrong.  One thing this patch should allow you to do is 
remove the '#include <expat.h>'s from all but the xml processing file itself.

nathan
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