Log Message:
Update ruby-httpclient to 2.2.1.

== Changes

= Changes in 2.2.1 =

  Jun 2, 2011 - version 2.2.1

    * Bug fixes

      * For Lighttpd + PUT/POST support, do not send a request using chunked
        encoding when IO respond to :size, File for example.

        - There is no need to send query with Transfer-Encoding: chuncked when
          IO respond to :size.
        - Lighttpd does not support PUT, POST with Transfer-Encoding: chuncked.
          You will see that the lighty respond with 200 OK, but there is a file
          whose size is zero.

        LIMITATION:
          timeout occurs certainly when you send very large file and
          @send_timeout is default since HTTPClient::Session#query() assumes
          that *all* write are finished in @send_timeout sec not each write.

        WORKAROUND:
          increment @send_timeout and @receive_timeout or set @send_timeout and
          @receive_timeout to 0 not to be timeout.

        This fix is by TANABE Ken-ichi <nabeken@tknetworks.org>. Thanks!

      * Allow empty http_proxy ENV variable. Just treat it the same as if it's
        nil/unset. This fix is by Ash Berlin <ash_github@firemirror.com>.
        Thanks!

      * Check EOF while reading chunked response and close the session. It
        raised NoMethodError.

    * Changes

      * Updated trusted CA certificates file (cacert.p7s and cacert_sha1.p7s).
        CA certs are imported from
        'Java(TM) SE Runtime Environment (build 1.6.0_25-b06)'.

      * Changed default chunk size from 4K to 16K. It's used for reading size
        at a time.