Your Original Code - Line 218 ...
if (health <= healthkitmax)
SetEntityHealth(client, health + healthkitadd)
if (health < healthkitmax)
new healthtemp = 0;
if((health + healthkitadd) > healthkitmax)
healthtemp = healthkitmax;
healthtemp = health + healthkitadd;
I changed the code so that a player can only get the "real" max hp edit in the config file.
In the original code a player can have more than the max hp edit in the config file eg. he have maxHP-1 and picked up a full care pack.
Maybe you wanne include this in the original plugin.