title: Sending "Set-Cookie" in a Python HTTP server
body: <p>How do I send the "Set-Cookie" header when working with a <code>BaseHTTPServerRequestHandler</code>, and <code>Cookie</code>? <code>BaseCookie</code> and children don't provide a method to output the value to be passed into <code>send_header()</code>, and <code>*Cookie.output()</code> does not provide a HTTP line delimiter.</p>
  
  <p>Which <code>Cookie</code> class should I be using? Two have survived into Python3, what are the differences?</p>