`RewindBlockIndex` was made to allow nodes upgrading to new consensus rules post-segwit fork to 
download new consensus data (i.e witnesses) without having to go through a whole IBD. It has been pointed than now really few pre-segwit nodes care to upgrade and that this logic may be irrelevant.

See https://github.com/bitcoin/bitcoin/pull/17737#discussion_r358514335 in review  of #17737 for more context pointers.
StopTorControl();
    
    
    if (node.scheduler) node.scheduler->stop();
    if (node.chainman && node.chainman->m_load_block.joinable()) node.chainman->m_load_block.join();
    StopScriptCheckWorkerThreads();
    
    
    node.peerman.reset();
    node.connman.reset();
    node.banman.reset();
    node.addrman.reset();
    if (node.mempool && node.mempool->IsLoaded() && node.args->GetArg("-persistmempool", DEFAULT_PERSIST_MEMPOOL)) {
        DumpMempool(*node.mempool);
    }
    
    if (node.fee_estimator) node.fee_estimator->Flush();
    
    if (node.chainman) {
        LOCK(cs_main);
        for (CChainState* chainstate : node.chainman->GetAll()) {
            if (chainstate->CanFlushToDisk()) {
                chainstate->ForceFlushStateToDisk();
            }
        }
    }
    
    
    GetMainSignals().FlushBackgroundCallbacks();