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

pnode->CloseSocketDisconnect();
                
                pnode->Release();
                vNodesDisconnected.push_back(pnode);
            }
        }
    }
    {
        
        std::list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
        for (CNode* pnode : vNodesDisconnectedCopy)
        {
            
            if (pnode->GetRefCount() <= 0) {
                bool fDelete = false;
                {
                    TRY_LOCK(pnode->cs_vSend, lockSend);
                    if (lockSend) {
                        fDelete = true;
                    }
                }
                if (fDelete) {
                    vNodesDisconnected.remove(pnode);
                    DeleteNode(pnode);
                }
            }
        }
    }
}
void CConnman::NotifyNumConnectionsChanged()