godoc/static: update jquery.treeview to 1.4.2

This has the primary benefit of clarifying the license as MIT.

Images have been "losslessly compressed" upstream; see
https://github.com/jzaefferer/jquery-treeview/commit/ca711d9.

Retrieved from
https://github.com/jzaefferer/jquery-treeview/releases/tag/1.4.2.

Change-Id: Ia111cbdf246d9adafa3d1c8cfbd7f0c5763cc935
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223077
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

godoc/static/jquery.treeview.css

@@ -1,4 +1,4 @@
-/* https://github.com/jzaefferer/jquery-treeview/blob/master/jquery.treeview.css */
+/* https://github.com/jzaefferer/jquery-treeview/blob/1.4.2/jquery.treeview.css */
 /* License: MIT. */
 .treeview, .treeview ul {
 	padding: 0;

godoc/static/jquery.treeview.edit.js

@@ -1,4 +1,4 @@
-/* https://github.com/jzaefferer/jquery-treeview/blob/master/jquery.treeview.edit.js */
+/* https://github.com/jzaefferer/jquery-treeview/blob/1.4.2/jquery.treeview.edit.js */
 /* License: MIT. */
 (function($) {
 	var CLASSES = $.treeview.classes;

godoc/static/jquery.treeview.js

@@ -1,17 +1,11 @@
 /*
- * Treeview 1.4.1 - jQuery plugin to hide and show branches of a tree
+ * Treeview 1.4.2 - jQuery plugin to hide and show branches of a tree
  *
  * http://bassistance.de/jquery-plugins/jquery-plugin-treeview/
- * http://docs.jquery.com/Plugins/Treeview
  *
- * Copyright (c) 2007 Jörn Zaefferer
- *
- * Dual licensed under the MIT and GPL licenses:
+ * Copyright Jörn Zaefferer
+ * Released under the MIT license:
  *   http://www.opensource.org/licenses/mit-license.php
- *   http://www.gnu.org/licenses/gpl.html
- *
- * Revision: $Id: jquery.treeview.js 5759 2008-07-01 07:50:28Z joern.zaefferer $
- *
  */
 
 ;(function($) {
@@ -205,7 +199,7 @@
 				break;
 			case "location":
 				var current = this.find("a").filter(function() {
-					return this.href.toLowerCase() == location.href.toLowerCase();
+					return location.href.toLowerCase().indexOf(this.href.toLowerCase()) == 0;
 				});
 				if ( current.length ) {
 					// TODO update the open/closed classes