URL Cleanup

This commit updates URLs to prefer the https protocol. Redirects are not followed to avoid accidentally expanding intentionally shortened URLs (i.e. if using a URL shortener).

# Fixed URLs

## Fixed Success
These URLs were switched to an https URL with a 2xx status. While the status was successful, your review is still recommended.

* http://www.apache.org/licenses/LICENSE-2.0 with 17 occurrences migrated to:
  https://www.apache.org/licenses/LICENSE-2.0 ([https](https://www.apache.org/licenses/LICENSE-2.0) result 200).
* http://www.apache.org/licenses/LICENSE-2.0.txt with 1 occurrences migrated to:
  https://www.apache.org/licenses/LICENSE-2.0.txt ([https](https://www.apache.org/licenses/LICENSE-2.0.txt) result 200).

Author: spring-operator

bootstrap/css/bootstrap-responsive.css

@@ -3,7 +3,7 @@
  *
  * Copyright 2012 Twitter, Inc
  * Licensed under the Apache License v2.0
- * http://www.apache.org/licenses/LICENSE-2.0
+ * https://www.apache.org/licenses/LICENSE-2.0
  *
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
  */

bootstrap/css/bootstrap-responsive.min.css

@@ -3,7 +3,7 @@
  *
  * Copyright 2012 Twitter, Inc
  * Licensed under the Apache License v2.0
- * http://www.apache.org/licenses/LICENSE-2.0
+ * https://www.apache.org/licenses/LICENSE-2.0
  *
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
  */