Changes:
* Support TLS-alpn mode.
* Support Post-As-Get
* Support Buypass.com CA
* Support 12 more dns api.
* Bug fixes.
* Use letsencrypt v2 api as default.
* Use dns over tls to check domain status.
* Support Windows native taskschuler for cronjob.
* fix IDN name issues.
* fix other issues.
A pure Unix shell script implementing ACME client protocol
* An ACME protocol client written purely in Shell (Unix shell) language.
* Full ACME protocol implementation.
* Support ACME v1 and ACME v2
* Support ACME v2 wildcard certs
* Simple, powerful and very easy to use. You only need 3 minutes to learn it.
* Bash, dash and sh compatible.
* Simplest shell script for Let's Encrypt free certificate client.
* Purely written in Shell with no dependencies on python or the official
Let's Encrypt client.
* Just one script to issue, renew and install your certificates automatically.
* DOES NOT require root/sudoer access.
* Docker friendly
* IPv6 support
