allow empty servers (Fixes: #3874)

Florian Schaal

2016-05-04 cc08f2c13f7155d6f3fb11afa7661aaec676858a

 interface/web/admin/lib/lang/de.lng

@@ -47,4 +47,6 @@
$wb['Remote Actions'] = 'Wartung';
$wb['Do OS-Update'] = 'Betriebssystem Update';
$wb['Do ISPConfig-Update'] = 'ISPConfig Update';
$wb['Sites'] = 'Sites';
$wb['DNS'] = 'DNS';
?>