public static Curator create(String connectionSpec, Optional<File> clientConfigFile) {
        return new Curator(ConnectionSpec.create(connectionSpec), clientConfigFile,
                           defaultJuteMaxBuffer, DEFAULT_ZK_SESSION_TIMEOUT);
    }
Creates a curator instance from a comma-separated string of ZooKeeper host:port strings
zkfacade/src/main/java/com/yahoo/vespa/curator/Curator.java