Update from 0.8.30 to 0.8.31.

Update http_redis module from 0.2.0 to 0.3.0.
Remove needless extra patch.

<ChangeLog>

*) Feature: now the "error_page" directive may redirect the 301 and 302
   responses.

*) Feature: the $geoip_city_continent_code, $geoip_latitude, and
   $geoip_longitude variables.
   Thanks to Arvind Sundararajan.

*) Feature: now the ngx_http_image_filter_module deletes always EXIF
   and other application specific data if the data consume more than 5%
   of a JPEG file.

*) Bugfix: nginx closed a connection if a cached response had an empty
   body.
   Thanks to Piotr Sikora.

*) Bugfix: nginx might not be built by gcc 4.x if the -O2 or higher
   optimization option was used.
   Thanks to Maxim Dounin and Denis F. Latypoff.

*) Bugfix: regular expressions in location were always tested in
   case-sensitive mode; the bug had appeared in 0.8.25.

*) Bugfix: nginx cached a 304 response if there was the "If-None-Match"
   header line in a proxied request.
   Thanks to Tim Dettrick and David Kostal.

*) Bugfix: nginx/Windows tried to delete a temporary file twice if the
   file should replace an already existent file.

</ChangeLog>

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