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

{
    LOCK(cs_vAddedNodes);
    for(std::vector<std::string>::iterator it = vAddedNodes.begin(); it != vAddedNodes.end(); ++it) {
        if (strNode == *it) {
            vAddedNodes.erase(it);
            return true;
        }
    }
    return false;
}
size_t CConnman::GetNodeCount(NumConnections flags)
{
    LOCK(cs_vNodes);
    if (flags == CConnman::CONNECTIONS_ALL) 
        return vNodes.size();
    int nNum = 0;
    for (const auto& pnode : vNodes) {
        if (flags & (pnode->IsInboundConn() ? CONNECTIONS_IN : CONNECTIONS_OUT)) {
            nNum++;
        }
    }
    return nNum;
}
void CConnman::GetNodeStats(std::vector<CNodeStats>& vstats)