Fix. Common. CURL parameters fixed.

Author: Glomberg

lib/Cleantalk.php

@@ -303,7 +303,6 @@ private function sendRequest($data, $url, $server_timeout = 3)
             curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
             curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // receive server response ...
             curl_setopt($ch, CURLOPT_HTTPHEADER, array('Expect:')); // resolve 'Expect: 100-continue' issue
-            curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0); // see http://stackoverflow.com/a/23322368
 
             curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // Disabling CA cert verivication and 
 			curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);     // Disabling common name verification