Rejecting TLS 1.0 / 1.1 for inbound ACME connections

API Announcements
2

Our Staging environment now reflects this change and can be used for testing applicable updates to your client. If you attempt to connect to https://acme-staging-v02.api.letsencrypt.org with TLS 1.0 or 1.1 you will get the following message:

{
  "type": "urn:ietf:params:acme:error:malformed",
  "detail": "upgrade your ACME client to support TLSv1.2 or better",
  "status": 400
}
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