jkg_healthRegen cvars

jkg_healthRegen - Health regen increment. 0 for no health regen.

jkg_healthRegenDelay - Delay before health regen resumes after leaving
combat in milliseconds.

jkg_healthRegenSpeed - Delay between each health regen tick in
milliseconds.
Merge pull request #1 from JKGDevs/master

Pull from main
Merge pull request #27 from gerbilOFdoom/master

jkg_healthRegen cvars