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).

# HTTP URLs that Could Not Be Fixed
These URLs were unable to be fixed. Please review them to see if they can be manually resolved.

* http://jcommander.org/apidocs/ (200) migrated to:
  http://jcommander.org/apidocs/ ([https](https://jcommander.org/apidocs/) result SSLHandshakeException).

# Fixed URLs

## Fixed Success
These URLs were fixed successfully.

* http://docs.spring.io/spring-framework/docs/current/javadoc-api/ migrated to:
  https://docs.spring.io/spring-framework/docs/current/javadoc-api/ ([https](https://docs.spring.io/spring-framework/docs/current/javadoc-api/) result 200).
* http://www.apache.org/licenses/LICENSE-2.0 migrated to:
  https://www.apache.org/licenses/LICENSE-2.0 ([https](https://www.apache.org/licenses/LICENSE-2.0) result 200).
* http://repo.spring.io/libs-milestone-local migrated to:
  https://repo.spring.io/libs-milestone-local ([https](https://repo.spring.io/libs-milestone-local) result 302).
* http://repo.spring.io/libs-snapshot-local migrated to:
  https://repo.spring.io/libs-snapshot-local ([https](https://repo.spring.io/libs-snapshot-local) result 302).
* http://repo.spring.io/release migrated to:
  https://repo.spring.io/release ([https](https://repo.spring.io/release) result 302).

# Ignored
These URLs were intentionally ignored.

* http://maven.apache.org/POM/4.0.0
* http://maven.apache.org/xsd/maven-4.0.0.xsd
* http://www.w3.org/2001/XMLSchema-instance

spring-shell-docs/pom.xml

@@ -147,7 +147,7 @@
 							<attach>false</attach>
 							<links>
 								<link>
-									http://docs.spring.io/spring-framework/docs/current/javadoc-api/
+									https://docs.spring.io/spring-framework/docs/current/javadoc-api/
 								</link>
 								<link>http://jcommander.org/apidocs/</link>
 								<link>https://docs.spring.io/spring-shell/docs/1.2.0.RELEASE/api/</link>