change HOST to ADDR

ADDR is recommended no clue why and what the differance is exactly but for me HOST dus not work ADDR does.

plugin/maintenancemode/plugin.php

@@ -124,7 +124,7 @@ if ($editFile && $isPlatformAdmin) {
 
     $default = '
 RewriteCond %{REQUEST_URI} !'.$append.'/maintenance.html$
-RewriteCond %{REMOTE_HOST} !^'.$implode.'
+RewriteCond %{REMOTE_ADDR} !^'.$implode.'
 RewriteRule \.*$ '.$append.'/maintenance.html [R=302,L]
 ';
     if (empty($block)) {