man: add version info

This tries to add information about when each option was added. It goes
back to version 183.

The version info is included from a separate file to allow generating it,
which would allow more control on the formatting of the final output.

man/systemd-sysctl.service.xml

@@ -62,6 +62,8 @@
         <term><option>--prefix=</option></term>
         <listitem>
           <para>Only apply rules with the specified prefix.</para>
+
+        <xi:include href="version-info.xml" xpointer="v230"/>
         </listitem>
       </varlistentry>
       <varlistentry id='strict'>
@@ -70,6 +72,8 @@
           <para>Always return non-zero exit code on failure (including invalid sysctl variable
           name and insufficient permissions), unless the sysctl variable name is prefixed with a "-"
           character.</para>
+
+          <xi:include href="version-info.xml" xpointer="v252"/>
         </listitem>
       </varlistentry>
 
@@ -97,7 +101,9 @@
         credential contents should follow the same format as any other <filename>sysctl.d/</filename> drop-in
         configuration file. If this credential is passed it is processed after all of the drop-in files read
         from the file system. The settings configured in the credential hence take precedence over those in
-        the file system.</para></listitem>
+        the file system.</para>
+
+        <xi:include href="version-info.xml" xpointer="v252"/></listitem>
       </varlistentry>
     </variablelist>