docs: remove section about dual RSA/ECDSA from User Guide (#9473)

As agreed here: https://github.com/certbot/certbot/pull/9465#discussion_r1025498427
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alexzorin 2022-11-18 08:35:20 +11:00 committed by GitHub
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@ -499,27 +499,6 @@ of existing certificates), you can add the following line to Certbot's
which will take effect upon the next renewal of each certificate.
Obtaining ECDSA certificates in addition to RSA certificates
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When Certbot configures the certificates it obtains with Apache or Nginx, all
HTTPS clients that we try to support can use certificates with ECDSA keys. If,
however, you are aware of having a specific need to support very old TLS
clients, you may want to obtain both ECDSA and RSA certificates for the same
domains. Certbot can only configure Apache or Nginx to use a single
certificate, however, you could manually configure your software to use the
different certificates depending on your needs.
When obtaining both ECDSA and RSA certificates for the same domains with
Certbot, we recommend using the ``--cert-name`` option to give your
certificates names so that you can easily identify them. For instance, you may
want to append "ecdsa" to the name of your ECDSA certificate by using a command
like
.. code-block:: shell
certbot certonly --key-type ecdsa --cert-name example.com-ecdsa
Revoking certificates
---------------------