+ <varlistentry>
+ <term><option>--listen-http=<replaceable>ADDRESS</replaceable></option></term>
+ <term><option>--listen-https=<replaceable>ADDRESS</replaceable></option></term>
+
+ <listitem><para><replaceable>ADDRESS</replaceable> must be
+ either a negative integer, in which case it will be
+ interpreted as the (negated) file descriptor number, or an
+ address suitable for <option>ListenStream=</option> (c.f.
+ <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
+ In the first case, matching file descriptor must be inherited
+ through
+ <varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname>.
+ In the second case, an HTTP or HTTPS server will be spawned on
+ this port, respectively for <option>--listen-http</option> and
+ <option>--listen-https</option>. Currenntly, only POST requests
+ to <filename>/upload</filename> with <literal>Content-Type:
+ application/vnd.fdo.journal</literal> are supported.</para>
+ </listitem>
+ </varlistentry>
+