Update docs for DNS settings etc. (#3936)

* Update docs for DNS settings of the services which need its CNAME record by default

- Buscarron
- Go-NEB; fix a line on the instruction as well
- wsproxy
- Cinny
- Element Web
- Hydrogen
- SchildiChat Web
- Dimension
- Etherpad
- Jitsi
- ntfy
- Grafana
- rageshake
- Sygnal

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings of the services which do not need its CNAME record by default

- matrix-alertmanager-receiver
- Honoroit
- maubot
- Heisenbridge
- Cactus Comments
- Matrix Authentication Service
- matrix-registration
- Sliding Sync proxy
- Synapse Admin
- synapse-usage-exporter

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings: ma1sd

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings: Email2Matrix

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings: Postmoogle

Remove the table from configuring-dns.md altogether

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for Cinny and Dimension: adopt the common note

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs/configuring-dns.md: add "Note" to the line on using Cloudflare DNS

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

---------

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
Co-authored-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-playbook-bridge-mautrix-wsproxy.md

@@ -6,6 +6,12 @@ The playbook can install and configure [mautrix-wsproxy](https://github.com/maut
 
 See the project's [documentation](https://github.com/mautrix/wsproxy/blob/master/README.md) to learn what it does and why it might be useful to you.
 
+## Adjusting DNS records
+
+By default, this playbook installs wsproxy on the `wsproxy.` subdomain (`wsproxy.example.com`) and requires you to create a CNAME record for `wsproxy`, which targets `matrix.example.com`.
+
+When setting, replace `example.com` with your own.
+
 ## Adjusting the playbook configuration
 
 To enable the bridge, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
@@ -28,9 +34,7 @@ There are some additional things you may wish to configure about the bridge.
 
 See [this section](configuring-playbook-bridge-mautrix-bridges.md#extending-the-configuration) on the [common guide for configuring mautrix bridges](configuring-playbook-bridge-mautrix-bridges.md) for details about variables that you can customize and the bridge's default configuration, including [bridge permissions](configuring-playbook-bridge-mautrix-bridges.md#configure-bridge-permissions-optional), [encryption support](configuring-playbook-bridge-mautrix-bridges.md#enable-encryption-optional), [relay mode](configuring-playbook-bridge-mautrix-bridges.md#enable-relay-mode-optional), [bot's username](configuring-playbook-bridge-mautrix-bridges.md#set-the-bots-username-optional), etc.
 
-### Adjusting the wsproxy URL
-
-By default, this playbook installs wsproxy on the `wsproxy.` subdomain (`wsproxy.example.com`) and requires you to [adjust your DNS records](#adjusting-dns-records).
+### Adjusting the wsproxy URL (optional)
 
 By tweaking the `matrix_mautrix_wsproxy_hostname` variable, you can easily make the service available at a **different hostname** than the default one.
 
@@ -41,11 +45,7 @@ Example additional configuration for your `vars.yml` file:
 matrix_mautrix_wsproxy_hostname: ws.example.com
 ```
 
-## Adjusting DNS records
-
-Once you've decided on the domain, **you may need to adjust your DNS** records to point the wsproxy domain to the Matrix server.
-
-By default, you will need to create a CNAME record for `wsproxy`. See [Configuring DNS](configuring-dns.md) for details about DNS changes.
+After changing the domain, **you may need to adjust your DNS** records to point the wsproxy domain to the Matrix server.
 
 ## Installing