Added a reference to the mpm-event's doc about the fact that it does not...

    and the ones where the only remaining thing to do is send the data to the client.

    </p>

    <p>This new architecture, leveraging non blocking sockets and modern kernel

       features exposed by <glossary>APR</glossary> (like Linux's epoll),

       does not require anymore the <code>mpm_accept</code> <directive module="core">Mutex</directive>

       configured to avoid the thundering herd problem.</p>

    <p>The total amount of connections that a single process/threads block can handle is regulated

        by the <directive>AsyncRequestWorkerFactor</directive> directive.</p>