modify username hint

configure_thurvserver.tpl

@@ -283,7 +283,7 @@ var _localLang = {
                                         {if $customfields[0].description}
                                             <span class="field-help-text">
                                                 <div class="alert alert-warning">
-                                                    {$customfields[0].description}
+                                                    {$customfields[0].description|replace:'\n':'<br />'}
                                                 </div>
                                             </span>
                                         {/if}