man: mention that NFTSet is only available for system services

diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml
index 4a91358623980ff51a64fddb7022865f5382b02d..8b58cd32d00d5f9a5e89b2faf051a8252376e279 100644 (file)
--- a/man/systemd.resource-control.xml
+++ b/man/systemd.resource-control.xml
@@ -1125,6 +1125,7 @@ NFTSet=cgroup:inet:filter:my_service user:inet:filter:serviceuser
         }
 }</programlisting>
           </para>
+        <xi:include href="system-only.xml" xpointer="singular"/>
         <xi:include href="version-info.xml" xpointer="v255"/></listitem>
       </varlistentry>