[SAC] Fwd: Action required: Let's Encrypt certificate renewals

[Alex Mandel]

Ah, this is the email, missed that one of them came to osgeo.

The solution is to upgrade certbot to at least 0.28 I believe, then it 
will use a newer method to authenticate.

Thanks,
Alex

-------- Forwarded Message --------
Subject: Action required: Let's Encrypt certificate renewals
Date: Fri, 18 Jan 2019 03:33:24 +0000
From: noreply at letsencrypt.org
To: sysadmin at osgeo.org

Hello,

**Action is required to prevent your Let's Encrypt certificate renewals 
from breaking.**

Your Let’s Encrypt client used ACME TLS-SNI-01 domain validation to 
issue a certificate in the past 60 days.

TLS-SNI-01 validation is reaching end-of-life and will stop working on 
**February 13th, 2019.**

You need to update your ACME client to use an alternative validation 
method (HTTP-01, DNS-01 or TLS-ALPN-01) before this date or your 
certificate renewals will break and existing certificates will start to 
expire.

If you need help updating your ACME client, please open a new topic in 
the Help category of the Let's Encrypt community forum:

   https://community.letsencrypt.org/c/help

Please answer all of the questions in the topic template so we can help you.

For more information about the TLS-SNI-01 end-of-life please see our API 
announcement:

https://community.letsencrypt.org/t/february-13-2019-end-of-life-for-all-tls-sni-01-validation-support/74209

Thank you,
   Let's Encrypt Staff