Add support for CloudDNS

markdownlint changes to all .md files

Fix more than 10 domains

Fix for ACMEv1 renewals

Update templates to ACMEv2 endpoints

Only select first URL returned from acme-v02

Fixes for post-as-get changes

Should probably be fixed up, I've only hacked up @dkerr64's version for acme.sh to work on my local instance. It assumes you're using curl, I didn't bother stealing acme.sh's whole library of functions.

DNS_ADD_COMMAND="~/.getssl/dns_freedns.sh add"
DNS_DEL_COMMAND="~/.getssl/dns_freedns.sh rm"

Fix #462 use POST-as-GET requests on ACMEv2 endpoints

Ref https://community.letsencrypt.org/t/acme-v2-scheduled-deprecation-of-unauthenticated-resource-gets/74380

Fix missing chain.crt #349

fix shellcheck issues

Add User-Agent header (fixes #453)

Applied ACMEv2 - thanks to darovic!!!