message: head_block_id -> fork_db_head_block_id in bnet_plugin
diff: @@ -573,7 +573,7 @@ namespace eosio {
  _app_ios.post( [self = shared_from_this(),callback]{
  auto& control = app().get_plugin<chain_plugin>().chain();
  auto lib = control.last_irreversible_block_num();
  - auto head = control.head_block_id();
  + auto head = control.fork_db_head_block_id();
  auto head_num = block_header::num_from_id(head);
  