Sometimes, for whatever reason, a user might have more peers than their slot limit. This occurs because we don't ensure every user completes every download they start. This means a user could stop a torrent, clear the slot, and start a new one, and then resume the first one using peers cached by the client. When a user did this, the peer that was stopped would no longer be shown by the tracker and stats weren't affected. When the user completed the torrent, they got a error saying they couldn't send a completed event without first sending a started event. This could only be resolved by restarting the client or pausing/resuming the torrent which would reset the stats for that torrent session. This PR accounts for this fact and will allow peers updates to continue, but the user will no longer be able to receive peers in the peer list, and other users won't receive their peer in the list.
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