title: Exclude urls without 'www' from Nutch 1.7 crawl
body: <p>I'm currently using Nutch 1.7 to crawl my domain. My issue is specific to URLs being indexed as www vs. non-www.</p>
  
  <p>Specifically, after firing the crawl and index to Solr 4.5 then validating the results on the front-end with AJAX Solr, the search results page lists results/pages that are both 'www' and '' urls such as:</p>
  
  <pre><code>www.mywebsite.com
  mywebsite.com
  www.mywebsite.com/page1.html
  mywebsite.com/page1.html
  </code></pre>
  
  <p>My understanding is that the url filtering aka regex-urlfilter.txt needs modification. Are there any regex/nutch experts that could suggest a solution?</p>
  
  <p>Here is the code on <a href="http://pastebin.com/Cp6vUxPR" rel="nofollow">pastebin</a>.</p>