Mod option to have creatures regen health

[ErminioLucente]

For custom creature types that dont eat or use lairs, rather, regeneration as their only means of healing. Can be used in map scripts also to enable regeneration for heroes/other creatures without it. Can also be casted by spells on self or allies.

[CREATURE]

• [ ] REGEN_AMOUNT = 0 > 256 [effectiveness of the spell]
• [ ] REGEN_INTERVAL = The delay [tics] between each heal.
• [ ] REGEN_SOUND = Sound played when regen activates [default is nothing]
• [ ] REGEN_EFFECT = The effect played when regen activates [default is nothing]

[SPELL]

• [ ] REGEN_AMOUNT = 0 > 256 [effectiveness of the spell]
• [ ] REGEN_INTERVAL = The delay [tics] between each heal.
• [ ] REGEN_SOUND = Sound played when regen activates
• [ ] REGEN_EFFECT = The effect played when regen activates
• [ ] Additional, can be combined with STRENGTH_BASED for the amount regained.

[walt253]

No need for a boolean, If Regen interval set to 0 you just disable it anyway to avoid a division by 0.