Log Message:
nginx 0.8.50:
    *) Feature: the "secure_link", "secure_link_md5", and
       "secure_link_expires" directives of the ngx_http_secure_link_module.

    *) Feature: the -q switch.
       Thanks to Gena Makhomed.

    *) Bugfix: worker processes may got caught in an endless loop during
       reconfiguration, if a caching was used; the bug had appeared in
       0.8.48.

    *) Bugfix: in the "gzip_disable" directive.
       Thanks to Derrick Petzold.

    *) Feature: the "image_filter_jpeg_quality" directive supports
       variables.

    *) Bugfix: a segmentation fault might occur in a worker process, if the
       $geoip_region_name variables was used; the bug had appeared in
       0.8.48.

    *) Bugfix: errors intercepted by error_page were cached only for next
       request; the bug had appeared in 0.8.48.

    *) Change: now the "server_name" directive default value is an empty
       name "".
       Thanks to Gena Makhomed.

    *) Change: now the "server_name_in_redirect" directive default value is
       "off".

    *) Feature: the $geoip_dma_code, $geoip_area_code, and
       $geoip_region_name variables.
       Thanks to Christine McGonagle.

    *) Bugfix: the "proxy_pass", "fastcgi_pass", \ 
"uwsgi_pass", and
       "scgi_pass" directives were not inherited inside \ 
"limit_except"
       blocks.

    *) Bugfix: the "proxy_cache_min_uses", \ 
"fastcgi_cache_min_uses"
       "uwsgi_cache_min_uses", and "scgi_cache_min_uses" \ 
directives did not
       work; the bug had appeared in 0.8.46.

    *) Bugfix: the "fastcgi_split_path_info" directive used incorrectly
       captures, if only parts of an URI were captured.
       Thanks to Yuriy Taraday and Frank Enderle.

    *) Bugfix: the "rewrite" directive did not escape a ";" \ 
character
       during copying from URI to query string.
       Thanks to Daisuke Murase.

    *) Bugfix: the ngx_http_image_filter_module closed a connection, if an
       image was larger than "image_filter_buffer" size.

    *) Bugfix: $request_time variable had invalid values for subrequests.

    *) Bugfix: errors intercepted by error_page could not be cached.

    *) Bugfix: a cache manager process may got caught in an endless loop,
       if max_size parameter was used; the bug had appeared in 0.8.46.

    *) Change: now the "proxy_no_cache", "fastcgi_no_cache",
       "uwsgi_no_cache", and "scgi_no_cache" directives \ 
affect on a cached
       response saving only.

    *) Feature: the "proxy_cache_bypass", "fastcgi_cache_bypass",
       "uwsgi_cache_bypass", and "scgi_cache_bypass" directives.

    *) Bugfix: nginx did not free memory in cache keys zones if there was
       an error during working with backend: the memory was freed only
       after inactivity time or on memory low condition.

    *) Feature: ngx_http_xslt_filter improvements.
       Thanks to Laurence Rowe.

    *) Bugfix: SSI response might be truncated after include with
       wait="yes"; the bug had appeared in 0.7.25.
       Thanks to Maxim Dounin.

    *) Bugfix: the "listen" directive did not support the \ 
"setfib=0"
       parameter.

    *) Change: now nginx does not cache by default backend responses, if
       they have a "Set-Cookie" header line.

    *) Feature: the "listen" directive supports the "setfib" \ 
parameter.
       Thanks to Andrew Filonov.

    *) Bugfix: the "sub_filter" directive might change character case on
       partial match.

    *) Bugfix: compatibility with HP/UX.

    *) Bugfix: compatibility with AIX xcl_r compiler.

    *) Bugfix: nginx treated large SSLv2 packets as plain requests.
       Thanks to Miroslaw Jaworski.

    *) Feature: large geo ranges base loading speed-up.

    *) Bugfix: an error_page redirection to "location /zero {return 204;}"
       without changing status code kept the error body; the bug had
       appeared in 0.8.42.

    *) Bugfix: nginx might close IPv6 listen socket during
       reconfiguration.
       Thanks to Maxim Dounin.

    *) Bugfix: the $uid_set variable may be used at any request processing
       stage.

    *) Change: now nginx tests locations given by regular expressions, if
       request was matched exactly by a location given by a prefix string.
       The previous behavior has been introduced in 0.7.1.

    *) Feature: the ngx_http_scgi_module.
       Thanks to Manlio Perillo.

    *) Feature: a text answer may be added to a "return" directive.