Document SERVICEFILE

Signed-off-by: Tom Eastep <teastep@shorewall.net>

docs/Install.xml

@@ -232,7 +232,7 @@
             <member>./install.sh
             <replaceable>shorewallrcfile-that-meets-your-needs</replaceable></member>
 
-            <member/>
+            <member></member>
 
             <member>Example: <command>./install
             shorewallrc.debian</command></member>
@@ -459,6 +459,17 @@
             </listitem>
           </varlistentry>
 
+          <varlistentry>
+            <term>SERVICEFILE</term>
+
+            <listitem>
+              <para>Added in Shorewall 4.5.20. When SYSTEMD is specified, this
+              variable names the file to be installed as the product's
+              .service file. If not specified, $PRODUCT.service is
+              assumed.</para>
+            </listitem>
+          </varlistentry>
+
           <varlistentry>
             <term>SYSCONFDIR</term>