title: Default SSL cert dir
body: <p>I have added support for loading HTTPS sites using asio following the example in the documentation which means I call <code>ctx.set_default_verify_paths();</code> to use the systems default paths for finding the certificates.</p>
  <p>However with this I am getting: <code>unable to get local issuer certificate</code> and I notice that it's trying to use <code>/usr/local/ssl/certs</code> on my Ubuntu system.</p>
  <p>But I don't even have that directory, instead the certificates seem to be in <code>/etc/ssl/certs</code> so if I am pointing the environment variable SSL_CERT_DIR there it works.</p>
  <p>My question is how the default is picked up and how to change it, I don't know if my system is wrong or if the wrong directory is picked up from asio/ssl for some other reason.</p>