Changes with nginx 0.7.58 18 May 2009

    *) Feature: a "listen" directive of the mail proxy module supports IPv6.

    *) Feature: the "image_filter_jpeg_quality" directive.

    *) Feature: the "client_body_in_single_buffer" directive.

    *) Feature: the $request_body variable.

    *) Bugfix: in ngx_http_autoindex_module in file name links having a ":"
       symbol in the name.

    *) Bugfix: "make upgrade" procedure did not work; the bug had appeared
       in 0.7.53.
       Thanks to Denis F. Latypoff.