The Problem
For Search Engine Optimization (SEO) purposes, it’s important that search engines have a consistent view of your site. This is known as URL Canonicalization. There are many ways in which to get to the same page on most sites. For example, these URLs all point to the same content:

http://www.example.com/
http://www.example.com/index.html
http://example.com/
http://example.com/index.html

You want search [...]