Bug#940512: <keygen> feature is no longer recommended by Mozilla

[Aron Xu <aron@debian.org>]

Package: sso.debian.org
Severity: normal

With a Firefox nightly 71.0a1 (2019-09-15), <keygen> tag does not work
for sso.debian.org anymore. After searching a little bit, it appears
that Mozilla claims on their website that <keygen> is no longer
recommended[1].

[1]https://developer.mozilla.org/en-US/docs/Web/HTML/Element/keygen

Regards,
Aron