Clearly state built-in ACME no longer works (#7824)

I'm tempted to remove this section entirely, but it's helpful for admins who are trying to figure out why their Synapse is crashing on start with ACME errors.

Signed-off-by: Luke W Faraone <luke@faraone.cc>
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Luke Faraone 2020-07-14 09:49:10 +00:00 committed by GitHub
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@ -405,13 +405,11 @@ so, you will need to edit `homeserver.yaml`, as follows:
``` ```
* You will also need to uncomment the `tls_certificate_path` and * You will also need to uncomment the `tls_certificate_path` and
`tls_private_key_path` lines under the `TLS` section. You can either `tls_private_key_path` lines under the `TLS` section. You will need to manage
point these settings at an existing certificate and key, or you can provisioning of these certificates yourself — Synapse had built-in ACME
enable Synapse's built-in ACME (Let's Encrypt) support. Instructions support, but the ACMEv1 protocol Synapse implements is deprecated, not
for having Synapse automatically provision and renew federation allowed by LetsEncrypt for new sites, and will break for existing sites in
certificates through ACME can be found at [ACME.md](docs/ACME.md). late 2020. See [ACME.md](docs/ACME.md).
Note that, as pointed out in that document, this feature will not
work with installs set up after November 2019.
If you are using your own certificate, be sure to use a `.pem` file that If you are using your own certificate, be sure to use a `.pem` file that
includes the full certificate chain including any intermediate certificates includes the full certificate chain including any intermediate certificates