title: http::proxy module engine
body: <p>I have a question about this CPAN module <a href="http://search.cpan.org/dist/HTTP-Proxy/" rel="nofollow">http://search.cpan.org/dist/HTTP-Proxy/</a> </p>
  
  <p>it seems that this module support engines </p>
  
  <p>Could someone explain me the difference between:</p>
  
  <pre><code>    use HTTP::Proxy;
      my $proxy = HTTP::Proxy-&gt;new( engine =&gt; 'NoFork' );
  </code></pre>
  
  <p>and :</p>
  
  <pre><code>    use HTTP::Proxy;
      my $proxy = HTTP::Proxy-&gt;new;
  </code></pre>
  
  <p>and: </p>
  
  <pre><code>   use HTTP::Proxy;
     my $proxy = HTTP::Proxy-&gt;new( engine =&gt; ScoreBoard );
  </code></pre>