disable settings in 'froxlor vhost settings' that wont have any effect if no IP/port has the 'create vHost container' option enabled; fixes #642

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

lib/Froxlor/Settings/FroxlorVhostSettings.php

@@ -0,0 +1,16 @@
+<?php
+namespace Froxlor\Settings;
+
+use Froxlor\Database\Database;
+
+class FroxlorVhostSettings
+{
+
+	public static function hasVhostContainerEnabled()
+	{
+		$sel_stmt = Database::prepare("SELECT COUNT(*) as vcentries FROM `" . TABLE_PANEL_IPSANDPORTS . "` WHERE `vhostcontainer`= '1'");
+		$result = Database::pexecute_first($sel_stmt);
+		return $result['vcentries'] > 0 ? true : false;
+	}
+
+}