Links with target="_blank" should have rel="noopener"

templates/footer.tpl

@@ -1,8 +1,8 @@
 <!-- {$smarty.template} -->
 <div id="footer">
-	<a target="_blank" href="http://postfixadmin.sf.net/">Postfix Admin {$version}</a>
+	<a target="_blank" rel="noopener" href="http://postfixadmin.sf.net/">Postfix Admin {$version}</a>
 	<span id="update-check">&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;
-	<a target="_blank" href="http://postfixadmin.sf.net/update-check.php?version={$version|escape:"url"}">{$PALANG.check_update}</a></span>
+	<a target="_blank" rel="noopener" href="http://postfixadmin.sf.net/update-check.php?version={$version|escape:"url"}">{$PALANG.check_update}</a></span>
     {if isset($smarty.session.sessid)}
         {if $smarty.session.sessid.username}
             &nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;	
@@ -11,7 +11,7 @@
     {/if}
 	{if $CONF.show_footer_text == 'YES' && $CONF.footer_link}
 		&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;
-		<a href="{$CONF.footer_link}">{$CONF.footer_text}</a>
+		<a href="{$CONF.footer_link}" rel="noopener">{$CONF.footer_text}</a>
 	{/if}
 </div>
 </div>