Change mailing list link to a URL to Google Groups
Change mailing list link to a URL to Google Groups

Using mailto: to a mailing list via a link that says "Join the mailing
list" seems like a sure way to get people to send an email with
"subscribe" as the subject. Upon reflection, we've decided we don't want
that.

avx2/avx2.github.io,avx2/avx2.github.io,avx2/avx2.github.io