修复一些错误

templates/manage_user.html

@@ -47,7 +47,7 @@
 </div>
 <div class="section">
   <div class="section__header">
-    <h1 class="section__title">{{ _('{0}: Users').format(system.uname) }}</h1>
+    <h1 class="section__title">{{ _('{0}: Users').format(domain.name) }}</h1>
     <div class="section__tools">
       <button class="primary rounded button" name="add_user">{{ _('Add User') }}</button>
     </div>