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.

{
    FILE *f = fsbridge::fopen(filename, "wb");
    if (f == nullptr)
        return false;
    if (fwrite(data.data(), 1, data.size(), f) != data.size()) {
        fclose(f);
        return false;
    }
    fclose(f);
    return true;
}
/** Controller that connects to Tor control socket, authenticate, then create
 * and maintain an ephemeral hidden service.
 */
class TorController