Load the state of this node (the alpha/ksize/id/immediate neighbors)
        from a cache file with the given fname.

def load_state(cls, fname):
        """
        Load the state of this node (the alpha/ksize/id/immediate neighbors)
        from a cache file with the given fname.
        """
        log.info("Loading state from %s", fname)
        with open(fname, 'rb') as file:
            data = pickle.load(file)
        svr = Server(data['ksize'], data['alpha'], data['id'])
        if data['neighbors']:
            svr.bootstrap(data['neighbors'])
        return svr