id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1299	Upstream docs	Olaf van der Spek		"> proxy_pass http://backend;

AFAIK this should be just backend. Server access protocols are defined in the upstream context itself.

http://nginx.org/en/docs/http/ngx_http_upstream_module.html"	defect	closed	minor		documentation	1.13.x	invalid				nginx version: nginx/1.10.3