    <p>
      <tt>verify-callback</tt>. The verify-callback is used to control the behaviour when the +SSL-VERIFY-PEER+ flag is set.
      <br/>
      Please note: this must be CFFI callback i.e. defined as <tt>(defcallback <name> :int ((ok :int) (ctx :pointer)) .. )</tt>.
        <br/>
        Defaults to <tt>verify-peer-callback</tt> which converts chain errors to <tt>ssl-error-verify</tt>.
    </p>
    <p>
      <tt>cipher-list</tt>. Sets the list of available ciphers for context.
      Possible values d