Only have capturing entities contribute to the capture regenrate.
Only entities which have capture attack themselves will contribute to the regen-rate of a structure.
The garrisonRegenRate is now a multiplier how much each unit contributes their strength.
Quite some gameplay change, but we can experiment with this.
Differential revision: https://code.wildfiregames.com/D4679
Comments by: @chrstgtr, @marder, @wraitii