[Multi] Fixes #1058 by including a 'force password update' option and also introduces a attributes json object to be used for further mailbox configurations in the future

data/web/user.php

@@ -89,6 +89,9 @@ elseif (isset($_SESSION['mailcow_cc_role']) && $_SESSION['mailcow_cc_role'] == '
 <div class="panel-body">
   <div class="row">
     <div class="col-sm-offset-3 col-sm-9">
+      <?php if ($mailboxdata['attributes']['force_pw_update'] == "1"): ?>
+      <div class="alert alert-danger"><?=$lang['user']['force_pw_update'];?></div>
+      <?php endif; ?>
       <p><a href="#pwChangeModal" data-toggle="modal">[<?=$lang['user']['change_password'];?>]</a></p>
       <p><a target="_blank" href="https://mailcow.github.io/mailcow-dockerized-docs/client/#<?=$clientconfigstr;?>">[<?=$lang['user']['client_configuration'];?>]</a></p>
     </div>