an be specified
   using the configuration parameters <a class="xref" href="runtime-config-connection.html#GUC-SSL-CERT-FILE">ssl_cert_file</a>
   and <a class="xref" href="runtime-config-connection.html#GUC-SSL-KEY-FILE">ssl_key_file</a>.
  </p><p>
   On Unix systems, the permissions on <code class="filename">server.key</code> must
   disallow any access to world or group; achieve this by the command
   <code class="command">chmod 0600 server.key</code>.  Alternatively, the file can be
   owned by root and