-+ Added HttpRequestPool::enablePipielining([bool enable = TRUE]) (libcurl >= 7.16.0)
-+ Added "dns_cache_timeout", "low_speed_limit", "low_speed_time", "max_send_speed",
- "max_recv_speed", "forbid_reuse" and "fresh_connect" request options
-+ Added HttpRequestDataShare (interface to curl_share)