Added clearing of r->valid_unparsed_uri on internal redirects. This resolves issue with try_files (see ticket #70), configuration like location / { try_files $uri /index.php; } location /index.php { proxy_pass http://backend; } caused nginx to use original request uri in a request to a backend. Historically, not clearing of the r->valid_unparsed_uri on internal redirect was a feature: it allowed to pass the same request to (another) upstream server via error_page redirection. Since then named locations appeared though, and it's time to start resetting r->valid_unparsed_uri on internal redirects. Configurations still using this feature should be converted to use named locations instead. Patch by Lanshun Zhou.

uwsgi_param  QUERY_STRING       $query_string;
uwsgi_param  REQUEST_METHOD     $request_method;
uwsgi_param  CONTENT_TYPE       $content_type;
uwsgi_param  CONTENT_LENGTH     $content_length;

uwsgi_param  REQUEST_URI        $request_uri;
uwsgi_param  PATH_INFO          $document_uri;
uwsgi_param  DOCUMENT_ROOT      $document_root;
uwsgi_param  SERVER_PROTOCOL    $server_protocol;
uwsgi_param  HTTPS              $https if_not_empty;

uwsgi_param  REMOTE_ADDR        $remote_addr;
uwsgi_param  REMOTE_PORT        $remote_port;
uwsgi_param  SERVER_PORT        $server_port;
uwsgi_param  SERVER_NAME        $server_name;