Proxy: strengthen syntax checking for some directives. The "false" parameter of the proxy_redirect directive is deprecated. Warning has been emitted since c2230102df6f (0.7.54). The "off" parameter of the proxy_redirect, proxy_cookie_domain, and proxy_cookie_path directives tells nginx not to inherit the configuration from the previous configuration level. Previously, after specifying the directive with the "off" parameter, any other directives were ignored, and syntax checking was disabled. The syntax was enforced to allow either one directive with the "off" parameter, or several directives with other parameters. Also, specifying "proxy_redirect default foo" no longer works like "proxy_redirect default".

scgi_param  REQUEST_METHOD     $request_method;
scgi_param  REQUEST_URI        $request_uri;
scgi_param  QUERY_STRING       $query_string;
scgi_param  CONTENT_TYPE       $content_type;

scgi_param  DOCUMENT_URI       $document_uri;
scgi_param  DOCUMENT_ROOT      $document_root;
scgi_param  SCGI               1;
scgi_param  SERVER_PROTOCOL    $server_protocol;
scgi_param  REQUEST_SCHEME     $scheme;
scgi_param  HTTPS              $https if_not_empty;

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