[Tails-dev] TLS certificate for git.tails.boum.org

Hi all,

I get a certificate warning when visiting https://git.tails.boum.org,
issued by immerda.ch.

I don't know how complex this is to do, but what about using letsencrypt
to get rid of the warning (which might confuse less skilled
users/contributors)?

Cheers,
~flapflap