Serve Let's Encrypt validation directory in TLS too
Summary:
Let's Encrypt tries to validate challenges at https://, not at http://
so the .well-known/acme-challenge/ folder must be available in TLS too.
Test Plan: certbot renew
Reviewers: dereckson
Reviewed By: dereckson
Differential Revision: https://devcentral.nasqueron.org/D1646