* add Linode example w/notes on API & type error
Linode's `linode_version` setting must be set with quotes in the YAML to prevent a type error. Also, included links to the API key information in Linode's documentation.
* Update letsencrypt/DOCS.md
Co-authored-by: Joakim Sørensen <hi@ludeeus.dev>
CloudFlare has improved its API, and as of [Certbot 1.6.0][1] (2020-07-07),
Certbot no longer requires permissions on all zones in your CloudFlare account.
(See PR certbot/certbot#8015.)
Verified in Let's Encrypt Add-on 4.11.0 running in Home Assistant 0.118.4.
[1]: https://github.com/certbot/certbot/releases/tag/v1.6.0
Give more details about the API Key requirements for DNS challenge with OVH, following [certbot documentation](https://certbot-dns-ovh.readthedocs.io/en/stable/).
Added example configuration and details about api_endpoint.
