Remove unused/useless convars * tf_escort_score_rate, hud_airboathint_numentries Rework cvars.AddChangeCallback filter * Convars that cannot be identified as server only or client only now run the callback in both realms * protected convars no longer run this callback at all More cvar cleanups * Removed sv_hudhint_sound, striderbuster_magnetic_force_hunter, sniper_xbox_delay, systemlinkport, matchmakingport, xmove, xlook