+ <notes>+ Added HttpRequest::flushCookies() (libcurl >= 7.17.1)
++ Added constant HTTP_URL_FROM_ENV
++ Added 'retrycount' and 'retrydelay' request options
++ Added libevent support for libcurl (>= 7.16.0):
+ o added --with-http-curl-libevent configure option
+ o added HttpRequestPool::enableEvents()