Lingering close changed to handle NGX_AGAIN. The "do { c->recv() } while (c->read->ready)" form used in the ngx_http_lingering_close_handler() is not really correct, as for example with SSL c->read->ready may be still set when returning NGX_AGAIN due to SSL_ERROR_WANT_WRITE. Therefore the above might be an infinite loop. This doesn't really matter in lingering close, as we shutdown write side of the socket anyway and also disable renegotiation (and even without shutdown and with renegotiation it requires using very large certificate chain and tuning socket buffers to trigger SSL_ERROR_WANT_WRITE). But for the sake of correctness added an NGX_AGAIN check.

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  REQUEST_SCHEME     $scheme;
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;