Support the name analysis_options.yaml for analysis options files

pkg/analysis_server/lib/src/server/driver.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 driver;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:math';
 
@@ skipping 295 matching lines @@
   /**
    * The package resolver provider used to override the way package URI's are
    * resolved in some contexts.
    */
   ResolverProvider packageResolverProvider;
 
   /**
    * If this flag is `true`, then single analysis context should be used for
    * analysis of multiple analysis roots, special files that could otherwise
    * cause creating additional contexts, such as `pubspec.yaml`, or `.packages`,
-   * or `.analysis_options` are ignored.
+   * or analysis options are ignored.
    */
   bool useSingleContextManager = false;
 
   /**
    * The plugins that are defined outside the analysis_server package.
    */
   List<Plugin> _userDefinedPlugins = <Plugin>[];
 
   SocketServer socketServer;
 
@@ skipping 284 matching lines @@
    */
   static void _rollLogFiles(String path, int numOld) {
     for (int i = numOld - 1; i >= 0; i--) {
       try {
         String oldPath = i == 0 ? path : '$path.$i';
         new File(oldPath).renameSync('$path.${i+1}');
       } catch (e) {}
     }
   }
 }