Changes with nginx 0.8.7 27 Jul 2009

    *) Change: minimum supported OpenSSL version is 0.9.7.

    *) Change: the "ask" parameter of the "ssl_verify_client" directive was
       changed to the "optional" parameter and now it checks a client
       certificate if it was offered.
       Thanks to Brice Figureau.

    *) Feature: the $ssl_client_verify variable.
       Thanks to Brice Figureau.

    *) Feature: the "ssl_crl" directive.
       Thanks to Brice Figureau.

    *) Feature: the "proxy" parameter of the "geo" directive.

    *) Feature: the "image_filter" directive supports variables for setting
       size.

    *) Bugfix: the $ssl_client_cert variable usage corrupted memory; the
       bug had appeared in 0.7.7.
       Thanks to Sergey Zhuravlev.

    *) Bugfix: "proxy_pass_header" and "fastcgi_pass_header" directives did
       not pass to a client the "X-Accel-Redirect", "X-Accel-Limit-Rate",
       "X-Accel-Buffering", and "X-Accel-Charset" lines from backend
       response header.
       Thanks to Maxim Dounin.

    *) Bugfix: in handling "Last-Modified" and "Accept-Ranges" backend
       response header lines; the bug had appeared in 0.7.44.
       Thanks to Maxim Dounin.

    *) Bugfix: the "[alert] zero size buf" error if subrequest returns an
       empty response; the bug had appeared in 0.8.5.