[WWW] simtest-howto.html clarifications, additions

[Dan Kegel]

Janis Johnson wrote:
> +    <p>The target characteristic can help you determine which targets to
> +    use to broaden the scope of your testing.  A CC0 target causes
> +    significantly different code to be generated and can matter more
> +    than word size and endianness in terms of detecting new breakage.</p>

What's a CC0 target?  I've googled and googled, and can't find a clue.

Thanks,
Dan