Force restart radvd on TZ change; closes #1551

src/www/system_general.php

@@ -133,6 +133,8 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     }
 
     if (count($input_errors) == 0) {
+        $timezone_changed = $config['system']['timezone'] != $pconfig['timezone'];
+
         $config['system']['hostname'] = $pconfig['hostname'];
         $config['system']['domain'] = $pconfig['domain'];
         $config['system']['timezone'] = $pconfig['timezone'];
@@ -229,6 +231,11 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         system_timezone_configure();
         filter_configure();
 
+        if ($timezone_changed) {
+            /* services that have trouble with changing time zones */
+            services_radvd_configure();
+        }
+
         header(url_safe('Location: /system_general.php?savemsg=%s', array(get_std_save_message(true))));
         exit;
     }