[lukepolo]

Practice servers set mp_autokick 0, so nothing ever moved an idle player off one.

• An idle clock per player: buttons, key changes, chat, HUD clicks, voice, and turning or moving (free-roam spectators by their observer view) reset it
• A warning, a final warning, then a kick (NETWORK_DISCONNECT_KICKED_IDLE) at the api's afk_kick_minutes; a missing or 0 value is off, and values are clamped to 0–1440
• The kick time is fixed at the first warning; raising the limit clears a pending warning; each warning or kick runs on its own
• Bots, GOTV and render pods are skipped; DEAFCS's open buy menu is not ported

Needs a run in real CS2 on a 5stackgg pod before merging, including spectators in free roam versus in-eye.

From DEAFCS: https://github.com/DEAFCS/game-server/commit/543c183e, https://github.com/DEAFCS/game-server/commit/f46b89a5