Using Ubuntu 18.04.2 LTS, with up-to-date, self-compiled master.
When I run
`./bitcoind -regtest -whitebind=bla`
I expect a clean shutdown with `Error: Cannot resolve -whitebind address: 'bla'`.
However sometimes my node doesn't stop and freezes (shutdown never finishes). 
This happens ~30% of the time for me, both on testnet and regtest. 

I believe that this is because `torControlThread.join();` never returns if it the thread is stopped right after its creation - it is started right before the whitebind part in `AppInitMain()`. If I insert a sleep before whitebind parameters are processed in Step 12 of `AppInitMain()` (or if I just disable the TorControl thread) the error does not occur.

Could someone try to reproduce? I encountered this testing #16248, but it is not restricted to this branch.

{
    TorControlConnection *self = static_cast<TorControlConnection*>(ctx);
    struct evbuffer *input = bufferevent_get_input(bev);
    size_t n_read_out = 0;
    char *line;
    assert(input);
    
    while((line = evbuffer_readln(input, &n_read_out, EVBUFFER_EOL_CRLF)) != nullptr)
    {
        std::string s(line, n_read_out);
        free(line);
        if (s.size() < 4) 
            continue;
        
        self->message.code = atoi(s.substr(0,3));
        self->message.lines.push_back(s.substr(4));
        char ch = s[3]; 
        if (ch == ' ') {
            
            if (self->message.code >= 600) {
                
                
                self->async_handler(*self, self->message);
            } else {
                if (!self->reply_handlers.empty()) {
                    
                    self->reply_handlers.front()(*self, self->message);
                    self->reply_handlers.pop_front();
                } else {
                    LogPrint(BCLog::TOR, "tor: Received unexpected sync reply %i\n", self->message.code);