Enable cookies for auth handler in nginx example config

nginx.conf.example

@@ -35,11 +35,14 @@ http {
 		}
 		location /files/ {
 			auth_request /auth;
+			auth_request_set $trackingcookie $upstream_http_set_cookie;
 			# For use with sshfs (recommended)
 				#alias /mnt/videoag/srv/videoag/released/;
+				#add_header Set-Cookie $trackingcookie;
 			# For use without sshfs
 				proxy_pass https://videoag.fsmpi.rwth-aachen.de/;
 				proxy_set_header Host "videoag.fsmpi.rwth-aachen.de";
+				proxy_set_header Set-Cookie $trackingcookie;
 		}
 		location / {
 			include /etc/nginx/uwsgi_params;