Ticket #8500: user_agent.patch

http.php

@@ -760 +760 @@
                 $arrContext = array('http' =>
                         array(
                                 'method' => strtoupper($r['method']),
-                                'user-agent' => $r['user-agent'],
+                                'user_agent' => $r['user-agent'],
                                 'max_redirects' => $r['redirection'],
                                 'protocol_version' => (float) $r['httpversion'],
                                 'header' => $strHeaders,