title: Configure Apache server to use specific OpenSSL Engine
body: <p>I have a working OpenSSL RSA engine (i.e. a <code>.so</code> file) and an Apache server configured in SSL mode.<br>
  How can I make Apache use RSA implementation from my RSA engine? In other words: Where do I put the engine (<code>.so</code> file), how do I modify the <code>openssl.cnf</code> file and how do I build the Apache?</p>