To be consistent with http package, check also no_proxy
To be consistent with http package, check also no_proxy

Default http.ProxyFromEnvironment uses uppper case proxy
environment variables first, and if they are not defined,
tries lower case. For NewProxierWithNoProxyCIDR we should
provide similar user experience.

Kubernetes-commit: 92350f336b7aec303ba502c785d13f0cab1ad7f8

kubernetes/apimachinery