[PATCH www 2/1] design.html: mention aarch64 as well as x86_64

[Michael Raskin <7c6f434c@mail.ru>]

>I'd like to continue to link to x86 Considered Harmful somewhere in
>the text, but couldn't figure out how to fit it in since there's not
>really anywhere I'm talking about x86 specifically rather than all
>architectures.  I'd appreciate suggestions for how I might do that.

I think it is nice to have «why not ARM» and «why not x86*» sections
when you have an implementation that you are justifying, and no doubts
on the way-cheaper attack level (there must be a memory attack on Sway
given a hijacked browser, mustn't there be?)

Right now, you getting a restful break is more useful than picking 
wording on choices Spectrum cannot yet afford to make.

[horrible mis-implementation of user hostility is worse than no
implementation, perfect implementations do nto exist]
> <p>
> I would like Spectrum to additionally have first class support for at

Looks fine

>+cannot be inspected and audited.  One of the advantages of Spectrum's
>+Linux base is the extremely wide hardware support that Linux offers,
>+so the only blocker for POWER9 support is support in crosvm for
>+virtualizing that architecture, which is outside the expertise of
>+anybody currently working on Spectrum but would be a very welcome
>+contribution.

Looks frank and true

> <p>
>-Ideally, all Spectrum packages, x86_64 and ppc64le, would be built on
>+Ideally, all Spectrum packages, for all architectures, would be built on
> POWER9 hardware.  Even if a user has to trust the x86_64 computer

_Ideally_ on diverse hardware with more than one transparent-ish 
platform, because lack of blobs to load does not mean lack of backed-in
vulnerable functionality. Open POWER9 cores help, but do not prove 
faithful implementation on a specific chip in your hands, all that 
stuff.

I would put as 
«
Ideally, all Spectrum packages, for all architectures, would be built on
diverse hardware including a platform with POWER9 level of openness.
»

But, again, this a bridge to burn once it is crossed, or something.