Plugin fixes some survivors health expolit. I highly recommend use this fix for all left 4 dead servers. All this bugs have been fixed in l4d2 you do not need use this plugin there. Use it in l4d only.
Explanation:
I attach screenshots it helps to understand what I'm talking about.
1. Regeneration - You should have less than 30hp before hang on a ledge, when teammates help you the game give a little health bonus.
2. Increasing of health limit - If you have a temporary health (pills) and you're hanging on a ledge look at health bar.
3. Disappearance of the temporary health - When survivors pulled you from the ledge pills health is disappears if it was.