@sgunhouse You got it completely wrong. My host connects to some websites like www.google.com, www.facebook.com, etc., loads data from them to localhost and some of them blocked in my country I asked it for only those connections inside localhost, of course I am not asking it for localhost itself.
In the end I've put proxy inside .php page and problem was solved for that time.
<?php
stream_context_set_default(['http'=>['proxy'=>'proxy-host:proxy-port']]);
?>
Some programs like hotspotshield completely passes everything trough its server so I could call blocked pages inside localhost.
I just wanted to learn if Opera has this kind of feature for sub-connections so I would use that one.
It does not matter really, forget it