add 'danger' alert to authad config settings

lib/plugins/authad/conf/metadata.php

 <?php
 
-$meta['account_suffix']     = array('string');
-$meta['base_dn']            = array('string');
-$meta['domain_controllers'] = array('string');
-$meta['sso']                = array('onoff');
-$meta['admin_username']        = array('string');
-$meta['admin_password']        = array('password');
-$meta['real_primarygroup']  = array('onoff');
-$meta['use_ssl']            = array('onoff');
-$meta['use_tls']            = array('onoff');
-$meta['debug']              = array('onoff');
-$meta['expirywarn']         = array('numeric', '_min'=>0);
-$meta['additional']         = array('string');
+$meta['account_suffix']     = array('string','_caution' => 'danger');
+$meta['base_dn']            = array('string','_caution' => 'danger');
+$meta['domain_controllers'] = array('string','_caution' => 'danger');
+$meta['sso']                = array('onoff','_caution' => 'danger');
+$meta['admin_username']     = array('string','_caution' => 'danger');
+$meta['admin_password']     = array('password','_caution' => 'danger');
+$meta['real_primarygroup']  = array('onoff','_caution' => 'danger');
+$meta['use_ssl']            = array('onoff','_caution' => 'danger');
+$meta['use_tls']            = array('onoff','_caution' => 'danger');
+$meta['debug']              = array('onoff','_caution' => 'danger');
+$meta['expirywarn']         = array('numeric', '_min'=>0,'_caution' => 'danger');
+$meta['additional']         = array('string','_caution' => 'danger');