Add docs for an empty trusted_key_servers config option (#13999)

* Add docs for an empty `trusted_key_servers` config option

* small rewording

* Tweak changelog
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Dirk Klimpel 2022-10-28 14:55:03 +02:00 committed by GitHub
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changelog.d/13999.doc Normal file
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Explain how to disable the use of `trusted_key_servers`.

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@ -2681,6 +2681,12 @@ is still supported for backwards-compatibility, but it is deprecated.
warning on start-up. To suppress this warning, set
`suppress_key_server_warning` to true.
If the use of a trusted key server has to be deactivated, e.g. in a private
federation or for privacy reasons, this can be realised by setting
an empty array (`trusted_key_servers: []`). Then Synapse will request the keys
directly from the server that owns the keys. If Synapse does not get keys directly
from the server, the events of this server will be rejected.
Options for each entry in the list include:
* `server_name`: the name of the server. Required.
* `verify_keys`: an optional map from key id to base64-encoded public key.