[1] ACME v2 API Endpoint Coming January 2018 - Let's Encrypt - Free SSL/TLS Certificates () <https://letsencrypt.org/2017/06/14/acme-v2-api.html>
[2] ACME v2 and Wildcard Certificate Support is Live - Issuance Policy - Let's Encrypt Community Support () <https://community.letsencrypt.org/t/acme-v2-and-wildcard-certificate-support-is-live/55579>