Is [this](https://github.com/C4T-BuT-S4D/S4DFarm/blob/3b8b057c95e0467c6afb3a47648e8b6befd1a815/client/start_sploit.py#L147) `flush` check needed if you export `PYTHONUNBUFFERED=1`? If so, what's the scenario?
