<varlistentry>
	<term><option>-x</option></term>
	<listitem>
		<para>
			Set the session-expiry-interval property on the CONNECT packet. If
			you use this option, the client will be set to be an MQTT v5 client.
			Set to 0-4294967294 to specify the session will expire in that many
			seconds after the client disconnects, or use -1, 4294967295, or ∞
			for a session that does not expire. Defaults to -1 if -c is also
			given, or 0 if -c not given.
		</para>
		<para>
			If the session is set to never expire, either with -x or -c, then a
			client id must be provided.
		</para>
	</listitem>
</varlistentry>
