Sređen CURLOPT_SSL_VERIFYPEER da uključuje validaciju remote CA

Adding FINA DEMO key from
https://cistest.apis-it.hr:8449/FiskalizacijaServiceTest

Can verify on your own like this, "The proper fix"
http://unitstep.net/blog/2009/05/05/using-curl-in-php-to-access-https-ssltls-protected-sites/