networkd: update manpage for optional Gateway=

Following commit 59580681f5f.

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 11b4370a6ec083c2d9102e8a35ea4ba094aa4573..1edaa0b2df8e1b90471bc7ff5db15da4e37d3d47 100644 (file)
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -429,7 +429,7 @@
                                 <varlistentry>
                                         <term><varname>Gateway=</varname></term>
                                         <listitem>
-                                                <para>As in the <literal>[Network]</literal> section. This key is mandatory.</para>
+                                                <para>As in the <literal>[Network]</literal> section.</para>
                                         </listitem>
                                 </varlistentry>
                                 <varlistentry>