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

LogPrintf("Warning: Unknown socket family\n");
        }
    }
    NetPermissionFlags permissionFlags = NetPermissionFlags::PF_NONE;
    hListenSocket.AddSocketPermissionFlags(permissionFlags);
    AddWhitelistPermissionFlags(permissionFlags, addr);
    bool legacyWhitelisted = false;
    if (NetPermissions::HasFlag(permissionFlags, NetPermissionFlags::PF_ISIMPLICIT)) {
        NetPermissions::ClearFlag(permissionFlags, PF_ISIMPLICIT);
        if (gArgs.GetBoolArg("-whitelistforcerelay", DEFAULT_WHITELISTFORCERELAY)) NetPermissions::AddFlag(permissionFlags, PF_FORCERELAY);
        if (gArgs.GetBoolArg("-whitelistrelay", DEFAULT_WHITELISTRELAY)) NetPermissions::AddFlag(permissionFlags, PF_RELAY);
        NetPermissions::AddFlag(permissionFlags, PF_MEMPOOL);
        NetPermissions::AddFlag(permissionFlags, PF_NOBAN);
        legacyWhitelisted = true;
    }
    {
        LOCK(cs_vNodes);
        for (const CNode* pnode : vNodes) {
            if (pnode->IsInboundConn()) nInbound++;
        }
    }
    if (hSocket == INVALID_SOCKET)
    {
        int nErr = WSAGetLastError();
        if (nErr != WSAEWOULDBLOCK)
            LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr));
        return;
    }
    if (!fNetworkActive) {
        LogPrintf("connection from %s dropped: not accepting new connections\n", addr.ToString());