Add indication of resolver provider to the status page

pkg/analysis_server/lib/src/status/get_handler.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analysis_server.src.status.get_handler;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 1648 matching lines @@
           Folder folder = _keyForValue(folderMap, operation.context);
           if (folder == null) {
             buffer.write('<p>Status: Analyzing in unmapped context</p>');
           } else {
             buffer.write('<p>Status: Analyzing in ${folder.path}</p>');
           }
         } else {
           buffer.write('<p>Status: Analyzing</p>');
         }
       }
+      buffer.write('<p>Using package resolver provider: ');
+      buffer.write(_server.packageResolverProvider != null);
+      buffer.write('</p>');
       buffer.write('<p>');
       buffer.write(makeLink(OVERLAYS_PATH, {}, 'All overlay information'));
       buffer.write('</p>');
 
       buffer.write('<p><b>Analysis Contexts</b></p>');
       buffer.write('<p>');
       bool first = true;
       folders.forEach((Folder folder) {
         if (first) {
           first = false;
@@ skipping 790 matching lines @@
    */
   static String makeLink(
       String path, Map<String, String> params, String innerHtml,
       [bool hasError = false]) {
     Uri uri = new Uri(path: path, queryParameters: params);
     String href = HTML_ESCAPE.convert(uri.toString());
     String classAttribute = hasError ? ' class="error"' : '';
     return '<a href="$href"$classAttribute>$innerHtml</a>';
   }
 }