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/ with 1 occurrences migrated to:
  https://www.apache.org/licenses/ ([https](https://www.apache.org/licenses/) result 200).
* [ ] http://www.apache.org/licenses/LICENSE-2.0 with 2638 occurrences migrated to:
  https://www.apache.org/licenses/LICENSE-2.0 ([https](https://www.apache.org/licenses/LICENSE-2.0) result 200).

src/checkstyle/checkstyle-header.txt

@@ -5,7 +5,7 @@
 ^\Q * you may not use this file except in compliance with the License.\E$
 ^\Q * You may obtain a copy of the License at\E$
 ^\Q *\E$
-^\Q *      http://www.apache.org/licenses/LICENSE-2.0\E$
+^\Q *      https://www.apache.org/licenses/LICENSE-2.0\E$
 ^\Q *\E$
 ^\Q * Unless required by applicable law or agreed to in writing, software\E$
 ^\Q * distributed under the License is distributed on an "AS IS" BASIS,\E$

src/dist/license.txt

@@ -1,6 +1,6 @@
                                  Apache License
                            Version 2.0, January 2004
-                        http://www.apache.org/licenses/
+                        https://www.apache.org/licenses/
 
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
@@ -192,7 +192,7 @@
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
 
-       http://www.apache.org/licenses/LICENSE-2.0
+       https://www.apache.org/licenses/LICENSE-2.0
 
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,