title: C++ Boost Logging: how to zip logs?
body: <p>I need to zip logs, produced by Boost Logging library. I see 2 approaches:</p>
  
  <ol>
  <li>Compress logs on the fly to BZip or GZip - <em>preferably</em></li>
  <li>Compress logs when rotating (make copy of log and zip it).</li>
  </ol>
  
  <p>How do I implement this?</p>