nixos/rl-2111: Document smokeping service updates

nixos/doc/manual/from_md/release-notes/rl-2111.section.xml

@@ -1501,6 +1501,23 @@ Superuser created successfully.
           option.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The
+          <link xlink:href="options.html#opt-services.smokeping.host">services.smokeping.host</link>
+          option was added and defaulted to
+          <literal>localhost</literal>. Before,
+          <literal>smokeping</literal> listened to all interfaces by
+          default. NixOS defaults generally aim to provide
+          non-Internet-exposed defaults for databases and internal
+          monitoring tools, see e.g.
+          <link xlink:href="https://github.com/NixOS/nixpkgs/issues/100192">#100192</link>.
+          Further, the systemd service for <literal>smokeping</literal>
+          got reworked defaults for increased operational stability, see
+          <link xlink:href="https://github.com/NixOS/nixpkgs/pull/144127">PR
+          #144127</link> for details.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The

nixos/doc/manual/release-notes/rl-2111.section.md

@@ -441,6 +441,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - The [networking.wireless.iwd](options.html#opt-networking.wireless.iwd.enable) module has a new [networking.wireless.iwd.settings](options.html#opt-networking.wireless.iwd.settings) option.
 
+- The [services.smokeping.host](options.html#opt-services.smokeping.host) option was added and defaulted to `localhost`. Before, `smokeping` listened to all interfaces by default. NixOS defaults generally aim to provide non-Internet-exposed defaults for databases and internal monitoring tools, see e.g. [#100192](https://github.com/NixOS/nixpkgs/issues/100192). Further, the systemd service for `smokeping` got reworked defaults for increased operational stability, see [PR #144127](https://github.com/NixOS/nixpkgs/pull/144127) for details.
+
 - The [services.syncoid.enable](options.html#opt-services.syncoid.enable) module now properly drops ZFS permissions after usage. Before it delegated permissions to whole pools instead of datasets and didn't clean up after execution. You can manually look this up for your pools by running `zfs allow your-pool-name` and use `zfs unallow syncoid your-pool-name` to clean this up.
 
 - Zfs: `latestCompatibleLinuxPackages` is now exported on the zfs package. One can use `boot.kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackages;` to always track the latest compatible kernel with a given version of zfs.