NetPlayServer: Clear remaining m_players when netplay thread ends so that their destructors can run while the ENetHost still exists. #10237
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Otherwise the QoSSession destructor attempts to access the already deleted ENetHost, which appears fairly harmless but is still technically a use-after-free. (and crashes Debug builds, which is how I found it)
e: Oh, to clarify, this is relevant when the host closes the window while some clients are still connected.