My second plugin :v
sm_regen <player> 1/0 (Flags: FCVAR_NOTIFY | Gives/removes regeneration to/of a player. 1 = On, Any other number = Off.)
sm_regentime <value> (Flags: FCVAR_NOTIFY | Defines the time of each regen loop.)
To compile you need colors.inc (
https://forums.alliedmods.net/showthread.php?t=96831)
Please report me errors.
21/07/2015 : Error fixes, ver 2.0.