Grenade trajectories aren't drawn in practice mode

[domyd]

It seems like sv_grenade_trajectory and sv_grenade_trajectory_time aren't valid commands anymore in CS2, but they seem to have been replaced by sv_grenade_trajectory_prac_trailtime. Setting that to something other than zero temporarily highlights thrown grenade paths again:

sv_grenade_trajectory_prac_trailtime 8

(The value is clamped between 0 and 8.)