Ingress NGINX regex is case insensitive

[Stevenjin8]

Unformation, Ingress NGINX is case insensitive. RE2 provides the (?i) for case insensitive matches, but its not on for default. The regex dialect is also case insensitive, so the common emitter isn't going to support this case. I'm probably going to have to write an istio emitter.

[Stevenjin8]

Turns out (?i) is supported by most regex engines