The security/letsencrypt/acme-tiny port
acme-tiny-4.0.4p3v0 – small 3rd-party letsencrypt client
This is a tiny (less than 200 lines) auditable script that can handle
issue and renewal of Let's Encrypt certificates, using calls to openssl(1)
to handle key operations. It's a third-party client, it doesn't originate
from letsencrypt.org themselves.