+* renamed ob_httpetaghandler to ob_etaghandler
+* http_chunked_decode() now silently passes through apparently not encoded data
+* added HttpMessage class and HttpException (PHP5 only)
+* added http.cache_log INI directive
+* added throttling capability to http_send()/HttpResponse
+* added hooks for custom request methods
+* added PUT support
+* added http_match_request_header()
+* added clean_ob parameter to HttpResponse::send()