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

{
    if (fListen && pnode->fSuccessfullyConnected)
    {
        CAddress addrLocal = GetLocalAddress(&pnode->addr, pnode->GetLocalServices());
        if (gArgs.GetBoolArg("-addrmantest", false)) {
            
            addrLocal = CAddress(CService(LookupNumeric("127.0.0.1", GetListenPort())), pnode->GetLocalServices());
        }
        
        
        
        FastRandomContext rng;
        if (IsPeerAddrLocalGood(pnode) && (!addrLocal.IsRoutable() ||
             rng.randbits((GetnScore(addrLocal) > LOCAL_MANUAL) ? 3 : 1) == 0))
        {
            addrLocal.SetIP(pnode->GetAddrLocal());
        }
        if (addrLocal.IsRoutable() || gArgs.GetBoolArg("-addrmantest", false))
        {
            LogPrint(BCLog::NET, "AdvertiseLocal: advertising address %s\n", addrLocal.ToString());
            pnode->PushAddress(addrLocal, rng);
        }
    }
}
bool AddLocal(const CService& addr, int nScore)