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://issues.gradle.org/browse/GRADLE-1116 with 1 occurrences migrated to:
  https://issues.gradle.org/browse/GRADLE-1116 ([https](https://issues.gradle.org/browse/GRADLE-1116) 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).
* http://projects.spring.io/spring-webflow with 1 occurrences migrated to:
  https://projects.spring.io/spring-webflow ([https](https://projects.spring.io/spring-webflow) result 301).
* http://springsource.org/downloads/sts with 1 occurrences migrated to:
  https://springsource.org/downloads/sts ([https](https://springsource.org/downloads/sts) result 301).
* http://repo.spring.io/libs-release with 1 occurrences migrated to:
  https://repo.spring.io/libs-release ([https](https://repo.spring.io/libs-release) result 302).
* http://repo.spring.io/libs-snapshot with 1 occurrences migrated to:
  https://repo.spring.io/libs-snapshot ([https](https://repo.spring.io/libs-snapshot) result 302).
* http://repo.spring.io/plugins-release with 1 occurrences migrated to:
  https://repo.spring.io/plugins-release ([https](https://repo.spring.io/plugins-release) result 302).

import-into-eclipse.sh

@@ -14,7 +14,7 @@ been tested against STS $STS_TEST_VERSION), but at the minimum you will
 need Eclipse + AJDT.
 
 If you need to download and install STS, please do that now by
-visiting http://springsource.org/downloads/sts
+visiting https://springsource.org/downloads/sts
 
 Otherwise, press enter and we'll begin.
 EOM