added users to the search index.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@4931 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Hudson.java

@@ -702,7 +702,7 @@ public final class Hudson extends View implements ItemGroup<TopLevelItem>, Node
             })
             .add(new CollectionSearchIndex() {// for users
                 protected User get(String key) { return getUser(key); }
-                protected Collection<User> all() { return Collections.emptySet(); } // TODO
+                protected Collection<User> all() { return User.getAll(); }
             })
             .add(new CollectionSearchIndex() {// for views
                 protected View get(String key) { return getView(key); }