Docs: Updated links to https where they are supported.

Close gh-2746

src/intro.js

@@ -1,13 +1,13 @@
 /*!
  * jQuery JavaScript Library v@VERSION
- * http://jquery.com/
+ * https://jquery.com/
  *
  * Includes Sizzle.js
- * http://sizzlejs.com/
+ * https://sizzlejs.com/
  *
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license
- * http://jquery.org/license
+ * https://jquery.org/license
  *
  * Date: @DATE
  */

src/manipulation.js

@@ -239,7 +239,7 @@ jQuery.extend( {
 		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
 				!jQuery.isXMLDoc( elem ) ) {
 
-			// We eschew Sizzle here for performance reasons: http://jsperf.com/getall-vs-sizzle/2
+			// We eschew Sizzle here for performance reasons: https://jsperf.com/getall-vs-sizzle/2
 			destElements = getAll( clone );
 			srcElements = getAll( elem );
 

src/queue/delay.js

@@ -5,7 +5,7 @@ define( [
 ], function( jQuery ) {
 
 // Based off of the plugin by Clint Helfers, with permission.
-// http://web.archive.org/web/20100324014747/http://blindsignals.com/index.php/2009/07/jquery-delay/
+// https://web.archive.org/web/20100324014747/http://blindsignals.com/index.php/2009/07/jquery-delay/
 jQuery.fn.delay = function( time, type ) {
 	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
 	type = type || "fx";