Isn't it ironic that even the writers of this article don't follow these rules in the examples on that page? There is "Mistake 3: Not Enabling Keepalive Connec

Isn't it ironic that even the writers of this article don't follow these rules in the examples on that page? There is "Mistake 3: Not Enabling Keepalive Connections to Upstream Servers", where it says: In the location{} block that forwards requests to an upstream group, include the following directives along with the proxy_pass directive: proxy_http_version 1.1; proxy_set_header "Connection" ""; Then, at "Mistake 10: Not Taking Advantage of Upstream Groups", the "location" block does not include these two directives, even though the "upstream" block contains a "keepalive" directive.