message: config builder: fix config.base.waypoint source
  otherwise safety rules and state-sync sees different waypoints after restarting
diff: @@ -197,7 +197,7 @@ impl<T: AsRef<Path>> ValidatorBuilder<T> {
  config.consensus.safety_rules.backend = self.secure_backend(&local_ns, "safety-rules");
  config.execution.backend = self.secure_backend(&local_ns, "execution");
  - let backend = self.secure_backend(&local_ns, "waypoint");
  + let backend = self.secure_backend(&local_ns, "safety-rules");
  config.base.waypoint = WaypointConfig::FromStorage(backend);
  config.execution.genesis = Some(genesis);
  config.execution.genesis_file_location = PathBuf::from("");
  