Added system reboot endpoint.

web/api/v1/restart/system/index.php

@@ -0,0 +1,23 @@
+<?php
+// Init
+error_reporting(NULL);
+ob_start();
+session_start();
+include($_SERVER['DOCUMENT_ROOT']."/inc/main.php");
+
+// Check token
+if ((!isset($_GET['token'])) || ($_SESSION['token'] != $_GET['token'])) {
+    exit();
+}
+
+if ($_SESSION['user'] == 'admin') {
+    if (!empty($_GET['hostname'])) {
+        exec (VESTA_CMD."v-restart-system yes", $output, $return_var);
+        $_SESSION['error_msg'] = 'The system is going down for reboot NOW!';
+    }
+    unset($output);
+}
+
+echo json_encode(array('error' => $_SESSION['error_msg']));
+
+unset($_SESSION['error_msg']);