UTF-8 SV

http://lists.libre-soc.org/pipermail/libre-soc-dev/2020-October/001000.html

turns out that is a somewhat different link than the one I thought I linked to, the one I intended to link to covers full vectorized validation including non-ASCII UTF-8, rather than just vectorizing a check-for-ASCII.

I think this is it: https://arxiv.org/pdf/2010.03090.pdf