docs: Rename "security-model.md" to "securing-your-zulip-server.md".

Updates relative links and any "security-model" label for ref links.

(cherry picked from commit 04275d8e14)

SECURITY.md

@@ -11,7 +11,7 @@ response within 24 hours.
 Please include details on the issue and how you'd like to be credited
 in our release notes when we publish the fix.
 
-Our [security model][security-model] document may be a helpful
+Our [security model][securing-your-zulip-server] document may be a helpful
 resource.
 
 ## Security announcements
@@ -32,6 +32,6 @@ reason to run older major releases.
 See also our documentation on the [Zulip release
 lifecycle][release-lifecycle].
 
-[security-model]: https://zulip.readthedocs.io/en/latest/production/security-model.html
+[securing-your-zulip-server]: https://zulip.readthedocs.io/en/latest/production/securing-your-zulip-server.html
 [upgrades]: https://zulip.readthedocs.io/en/stable/production/upgrade.html#upgrading-to-a-release
 [release-lifecycle]: https://zulip.readthedocs.io/en/latest/overview/release-lifecycle.html

docs/_templates/layout.html

@@ -6,7 +6,7 @@
     # version e.g. to say that something is likely to have changed.
     # For more info see: https://www.sphinx-doc.org/en/master/templating.html
     #}
-    {% if pagename in ["production/system-configuration", "production/reverse-proxies"] and release.endswith('+git') %}
+    {% if pagename in ["production/securing-your-zulip-server"] and release.endswith('+git') %}
     {#
     # This page doesn't exist in the stable documentation yet.
     # This temporary workaround prevents test failures and should be removed after the next release.

docs/overview/architecture-overview.md

@@ -53,7 +53,7 @@ means that one person might be a user of multiple Zulip realms. The
 administrators of an organization have a great deal of control over
 who can register an account, what permissions new users have, etc. For
 more on security considerations and options, see [the security model
-section](../production/security-model.md) and the [Zulip help
+section](../production/securing-your-zulip-server.md) and the [Zulip help
 center](https://zulip.com/help/).
 
 ## Components

docs/overview/changelog.md

@@ -1958,7 +1958,7 @@ _Released 2023-01-23_
 - Updated the Intercom integration to return success on `HEAD`
   requests, which it uses to verify its configuration.
 - Documented how each
-  [rate limit](../production/security-model.md#rate-limiting)
+  [rate limit](../production/securing-your-zulip-server.md#rate-limiting)
   category is used.
 - Documented the `reset_authentication_attempt_count` command for when users
   lock themselves out.

docs/overview/release-lifecycle.md

@@ -51,9 +51,9 @@ When new security releases are published, we simultaneously publish
 the fixes to the `main` and stable release branches, so
 that anyone using those branches can immediately upgrade as well.
 
-See also our [security model][security-model] documentation.
+See also our [security model][securing-your-zulip-server] documentation.
 
-[security-model]: ../production/security-model.md
+[securing-your-zulip-server]: ../production/securing-your-zulip-server.md
 
 ### Git versions
 

docs/production/index.md

@@ -14,7 +14,7 @@ system-configuration
 mobile-push-notifications
 upgrade
 modify
-security-model
+securing-your-zulip-server
 authentication-methods
 export-and-import
 postgresql

docs/production/maintain-secure-upgrade.md

@@ -13,7 +13,7 @@ Moved to [Troubleshooting](troubleshooting.md#monitoring).
 
 ### Securing your Zulip server
 
-Moved to [Security model](security-model.md).
+Moved to [Securing your Zulip server](securing-your-zulip-server.md).
 
 ### Upgrading
 

docs/production/password-strength.md

@@ -8,7 +8,7 @@ When a user tries to set a password, we use [zxcvbn][zxcvbn] to check
 that it isn't a weak one.
 
 See discussion in [our main docs for server
-admins](security-model.md#passwords). This doc explains in more
+admins](securing-your-zulip-server.md#passwords). This doc explains in more
 detail how we set the default threshold (`PASSWORD_MIN_GUESSES`) we use.
 
 First, read the doc section there. (It's short.)

docs/production/upload-backends.md

@@ -168,7 +168,7 @@ The file uploads bucket should have a policy of:
 ```
 
 The file-uploads bucket should not be world-readable. See the
-[documentation on the Zulip security model](security-model.md) for
+[documentation on the Zulip security model](securing-your-zulip-server.md) for
 details on the security model for uploaded files.
 
 However, the avatars bucket is intended to be world-readable, so its