-- Renamed http_connectcode to connect_code in the request info array
-- Rewrote internal request API
-- Enable "original headers" previously stripped off by the message parser:
- o X-Original-Transfer-Encoding (Transfer-Encoding)
- o X-Original-Content-Encoding (Content-Encoding)
- o X-Original-Content-Length (Content-Length)
-- RequestExceptions thrown by HttpRequestPool::__construct() and send() are
- now wrapped into the HttpRequestPoolException object's $exceptionStack property