Sets a player's health to 150% when touching a resupply locker in spawn. The health boost drains away just like the overheal from a medic's medigun.
Cvars:
sm_locker_overheal_enabled - 1/0
Uses the default TF2 Cvars for the medigun for the max overheal and decay duration:
sm_cvar tf_max_health_boost (default 1.5) for the max overheal
sm_cvar tf_boost_drain_time (default 15 seconds) for the duration