To be able to label incoming tor connections as different from normal localhost connections in e.g. `getpeerinfo` and the peers list in the GUI it'd be useful to have them connect on an alternative local-only port. Or even better, a UNIX socket.

For manually set-up hidden services this would have to be configured manually and could add a `hsport` option or such. The external port would still appear as `XXXXXXXXX.onion:8333`, however internally it would redirect to a that port.

In the case of `torcontrol` this would be easy to set up automatically. It could add a new (localhost) binding port automatically and this code would have to be changed:
- https://github.com/bitcoin/bitcoin/blob/master/src/torcontrol.cpp#L441
- https://github.com/bitcoin/bitcoin/blob/master/src/torcontrol.cpp#L477

strLoadError = _("Error upgrading chainstate database");
                        failed_chainstate_init = true;
                        break;
                    }
                    
                    if (!chainstate->ReplayBlocks(chainparams)) {
                        strLoadError = _("Unable to replay blocks. You will need to rebuild the database using -reindex-chainstate.");
                        failed_chainstate_init = true;
                        break;
                    }
                    
                    chainstate->InitCoinsCache(nCoinCacheUsage);
                    assert(chainstate->CanFlushToDisk());
                    if (!is_coinsview_empty(chainstate)) {
                        
                        if (!chainstate->LoadChainTip(chainparams)) {
                            strLoadError = _("Error initializing block database");
                            failed_chainstate_init = true;
                            break; 
                        }
                        assert(chainstate->m_chain.Tip() != nullptr);
                    }
                }
                if (failed_chainstate_init) {
                    break; 
                }
            } catch (const std::exception& e) {
                LogPrintf("%s\n", e.what());
                strLoadError = _("Error opening block database");
                break;