<varlistentry>
	<term><option>--tls-engine</option></term>
	<listitem>
		<para>
			A valid openssl engine id. These can be listed with the
			<command>openssl engine</command> command.
		</para>
		<para>
			See also <option>--keyform</option>.
		</para>
	</listitem>
</varlistentry>
