CreateConfig takes a clientCfg and builds a config (kubeconfig style) from it.

GetClusterNicknameFromURL returns host:port of the apiServerLocation, with .'s replaced by -'s.

TODO should use library-go's version or even better upstream above.

MergeConfig adds the additional Config stanzas to the startingConfig.

NormalizeServerURL is opinionated normalization of a string that represents a URL.

TODO should be moved upstream.