URL Cleanup (#222)

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 But Review Recommended
These URLs were fixed, but the https status was not OK. However, the https status was the same as the http request or http redirected to an https URL, so they were migrated. Your review is recommended.

* [ ] http://compose.docker.io/ (UnknownHostException) with 1 occurrences migrated to:
  https://compose.docker.io/ ([https](https://compose.docker.io/) result UnknownHostException).

## 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://curator.apache.org with 3 occurrences migrated to:
  https://curator.apache.org ([https](https://curator.apache.org) result 200).
* [ ] http://curator.apache.org/curator-x-discovery/ with 1 occurrences migrated to:
  https://curator.apache.org/curator-x-discovery/ ([https](https://curator.apache.org/curator-x-discovery/) result 200).
* [ ] http://github.com/ with 1 occurrences migrated to:
  https://github.com/ ([https](https://github.com/) result 200).
* [ ] http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html with 2 occurrences migrated to:
  https://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html ([https](https://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html) result 200).
* [ ] http://zookeeper.apache.org with 2 occurrences migrated to:
  https://zookeeper.apache.org ([https](https://zookeeper.apache.org) result 200).
* [ ] http://zookeeper.apache.org/doc/current/zookeeperOver.html with 2 occurrences migrated to:
  https://zookeeper.apache.org/doc/current/zookeeperOver.html ([https](https://zookeeper.apache.org/doc/current/zookeeperOver.html) result 200).
* [ ] http://zookeeper.apache.org/doc/current/zookeeperStarted.html with 7 occurrences migrated to:
  https://zookeeper.apache.org/doc/current/zookeeperStarted.html ([https](https://zookeeper.apache.org/doc/current/zookeeperStarted.html) result 200).
* [ ] http://plugins.jetbrains.com/plugin/6546 with 2 occurrences migrated to:
  https://plugins.jetbrains.com/plugin/6546 ([https](https://plugins.jetbrains.com/plugin/6546) result 301).
* [ ] http://raw.github.com/ with 1 occurrences migrated to:
  https://raw.github.com/ ([https](https://raw.github.com/) result 301).
* [ ] http://eclipse.org with 1 occurrences migrated to:
  https://eclipse.org ([https](https://eclipse.org) result 302).
* [ ] http://eclipse.org/m2e/ with 2 occurrences migrated to:
  https://eclipse.org/m2e/ ([https](https://eclipse.org/m2e/) result 302).
* [ ] http://www.springsource.com/developer/sts with 1 occurrences migrated to:
  https://www.springsource.com/developer/sts ([https](https://www.springsource.com/developer/sts) result 302).

# Ignored
These URLs were intentionally ignored.

* http://foo:7001/ with 1 occurrences
* http://hello-world/ with 1 occurrences
* http://localhost with 1 occurrences
* http://localhost:8080 with 4 occurrences
* http://localhost:8081/service-registry with 1 occurrences

docs/src/main/asciidoc/README.adoc

@@ -6,8 +6,8 @@ include::intro.adoc[]
 
 ZooKeeper is a centralized service for maintaining configuration information, naming,
 providing distributed synchronization, and providing group services. See the
-http://zookeeper.apache.org[Zookeeper site] for more information. Spring Cloud Zookeeper
-also builds on the http://curator.apache.org[Apache Curator] project, which started life
+https://zookeeper.apache.org[Zookeeper site] for more information. Spring Cloud Zookeeper
+also builds on the https://curator.apache.org[Apache Curator] project, which started life
 at Netflix.
 
 == Spring Cloud Zookeeper Features
@@ -19,11 +19,11 @@ Spring Cloud Zookeeper includes the following features:
 
 == Running the Sample
 
-. http://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_Download[Install
+. https://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_Download[Install
 zookeeper] (On a mac with homebrew, use `brew install zookeeper`).
-. http://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_InstallingSingleMode[Start
+. https://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_InstallingSingleMode[Start
 zookeeper].
-. http://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_ConnectingToZooKeeper[Verify
+. https://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_ConnectingToZooKeeper[Verify
 zookeeper is running].
 . Run `mvn --settings .settings.xml package`.
 Doing so brings in the required Spring Cloud Maven repositories and Build.

docs/src/main/asciidoc/spring-cloud-zookeeper.adoc

@@ -1,7 +1,7 @@
 :github-tag: master
 :github-repo: spring-cloud/spring-cloud-zookeeper
-:github-raw: http://raw.github.com/{github-repo}/{github-tag}
-:github-code: http://github.com/{github-repo}/tree/{github-tag}
+:github-raw: https://raw.github.com/{github-repo}/{github-tag}
+:github-code: https://github.com/{github-repo}/tree/{github-tag}
 :toc: left
 :nofooter:
 
@@ -11,7 +11,7 @@ include::intro.adoc[]
 
 [[spring-cloud-zookeeper-install]]
 == Install Zookeeper
-See the http://zookeeper.apache.org/doc/current/zookeeperStarted.html[installation
+See the https://zookeeper.apache.org/doc/current/zookeeperStarted.html[installation
 documentation] for instructions on how to install Zookeeper.
 
 Spring Cloud Zookeeper uses Apache Curator behind the scenes.
@@ -67,8 +67,8 @@ compile('org.apache.zookeeper:zookeeper:3.4.12') {
 
 Service Discovery is one of the key tenets of a microservice based architecture. Trying to
 hand-configure each client or some form of convention can be difficult to do and can be
-brittle. http://curator.apache.org[Curator](A Java library for Zookeeper) provides Service
-Discovery through a http://curator.apache.org/curator-x-discovery/[Service Discovery
+brittle. https://curator.apache.org[Curator](A Java library for Zookeeper) provides Service
+Discovery through a https://curator.apache.org/curator-x-discovery/[Service Discovery
 Extension]. Spring Cloud Zookeeper uses this extension for service registration and
 discovery.
 
@@ -491,7 +491,7 @@ overridden.
 == Distributed Configuration with Zookeeper
 
 Zookeeper provides a
-http://zookeeper.apache.org/doc/current/zookeeperOver.html#sc_dataModelNameSpace[hierarchical namespace]
+https://zookeeper.apache.org/doc/current/zookeeperOver.html#sc_dataModelNameSpace[hierarchical namespace]
 that lets clients store arbitrary data, such as configuration data. Spring Cloud Zookeeper
 Config is an alternative to the
 https://github.com/spring-cloud/spring-cloud-config[Config Server and Client].