/etc/nginx/uwsgi_params is in nginx-common 1.4.6-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15  | 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	UWSGI_SCHEME		$scheme;
uwsgi_param	REMOTE_ADDR		$remote_addr;
uwsgi_param	REMOTE_PORT		$remote_port;
uwsgi_param	SERVER_PORT		$server_port;
uwsgi_param	SERVER_NAME		$server_name;
 |