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://patorjk.com/software/taag (301) with 2 occurrences could not be migrated:
   ([https](https://patorjk.com/software/taag) result SSLHandshakeException).

# 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://mojo.codehaus.org/appassembler/appassembler-maven-plugin/ (UnknownHostException) with 1 occurrences migrated to:
  https://mojo.codehaus.org/appassembler/appassembler-maven-plugin/ ([https](https://mojo.codehaus.org/appassembler/appassembler-maven-plugin/) result UnknownHostException).
* [ ] http://static.springsource.org/spring-roo/reference/html-single/index.html (301) with 1 occurrences migrated to:
  https://docs.spring.io/spring-roo/reference/html-single/index.html ([https](https://static.springsource.org/spring-roo/reference/html-single/index.html) result 404).

## 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://en.wikipedia.org/wiki/ASCII_art with 1 occurrences migrated to:
  https://en.wikipedia.org/wiki/ASCII_art ([https](https://en.wikipedia.org/wiki/ASCII_art) result 200).
* [ ] http://maven.apache.org with 1 occurrences migrated to:
  https://maven.apache.org ([https](https://maven.apache.org) result 200).
* [ ] http://maven.apache.org/xsd/maven-4.0.0.xsd with 1 occurrences migrated to:
  https://maven.apache.org/xsd/maven-4.0.0.xsd ([https](https://maven.apache.org/xsd/maven-4.0.0.xsd) result 200).
* [ ] http://repo.spring.io/libs-milestone/ with 1 occurrences migrated to:
  https://repo.spring.io/libs-milestone/ ([https](https://repo.spring.io/libs-milestone/) result 200).
* [ ] 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 200).
* [ ] http://blog.springsource.com/2011/02/11/spring-framework-3-1-m1-released/ (301) with 1 occurrences migrated to:
  https://spring.io/blog/2011/02/11/spring-framework-3-1-m1-released/ ([https](https://blog.springsource.com/2011/02/11/spring-framework-3-1-m1-released/) result 200).
* [ ] http://www.springframework.org/schema/beans/spring-beans.xsd with 3 occurrences migrated to:
  https://www.springframework.org/schema/beans/spring-beans.xsd ([https](https://www.springframework.org/schema/beans/spring-beans.xsd) result 200).
* [ ] http://www.springframework.org/schema/context/spring-context-3.1.xsd with 2 occurrences migrated to:
  https://www.springframework.org/schema/context/spring-context-3.1.xsd ([https](https://www.springframework.org/schema/context/spring-context-3.1.xsd) result 200).
* [ ] http://www.springframework.org/schema/context/spring-context.xsd with 1 occurrences migrated to:
  https://www.springframework.org/schema/context/spring-context.xsd ([https](https://www.springframework.org/schema/context/spring-context.xsd) result 200).
* [ ] http://www.springsource.org/about with 1 occurrences migrated to:
  https://www.springsource.org/about ([https](https://www.springsource.org/about) result 302).
* [ ] http://www.springsource.org/spring-roo/ with 1 occurrences migrated to:
  https://www.springsource.org/spring-roo/ ([https](https://www.springsource.org/spring-roo/) result 302).

# Ignored
These URLs were intentionally ignored.

* http://docbook.org/ns/docbook with 13 occurrences
* http://maven.apache.org/POM/4.0.0 with 2 occurrences
* http://www.springframework.org/schema/beans with 6 occurrences
* http://www.springframework.org/schema/context with 6 occurrences
* http://www.w3.org/1998/Math/MathML with 6 occurrences
* http://www.w3.org/1999/xhtml with 6 occurrences
* http://www.w3.org/1999/xlink with 7 occurrences
* http://www.w3.org/2000/svg with 6 occurrences
* http://www.w3.org/2001/XInclude with 4 occurrences
* http://www.w3.org/2001/XMLSchema-instance with 4 occurrences

samples/helloworld/src/main/resources/META-INF/spring/spring-shell-plugin.xml

@@ -2,8 +2,8 @@
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:context="http://www.springframework.org/schema/context"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
 
 	<context:component-scan base-package="org.springframework.shell.samples.helloworld.commands" />