// APIAddress holds a list of API addresses. It may not be
	// current, and it will be empty if the environment has not been
	// bootstrapped.
	Addresses []string

	// Hostnames holds a list of API addresses which may contain
	// unresolved hostnames. It's used to compare more recent API
	// addresses before resolving hostnames to determine if the cached
	// addresses have changed and therefore perform (a possibly slow)
	// local DNS resolution before comparing them against Addresses.
	Hostnames []string