title: How to rescue all exceptions under a certain namespace?
body: <p>Is there a way to rescue all exceptions under a certain namespace?</p>
  
  <p>For example, I want to rescue all of the Errno::* exceptions (Errno::ECONNRESET, Errno::ETIMEDOUT). I can go ahead and list them all out on my exception line, but I was wondering if I can do something like.</p>
  
  <pre><code>begin
    # my code
  rescue Errno
    # handle exception
  end
  </code></pre>
  
  <p>The above idea doesn't seem to work, thus is there something similar that can work?</p>