th-client</code> to terminate when clients exit</li>
<li><code>idle-timeout</code> to prevent unused client sessions from
consuming server resources</li>
<li><code>server-idle-timeout</code> to prevent unused servers from
consuming resources</li>
<li><code>start-via-proxy</code> causes the sessions to be registered
with the system's login service, which usually has the effect of moving
them to their own session control group</li>
<li><code>systemd-run</code> runs the server in a transient systemd
scope unit