* Modfied frontline vector to ensure start point stays outside of
exclusion zone. (Previously it could be up to 100m inside)
* Change randomization in offset distance from frontline to be based
on a percentage of the unit type's fixed offset instead of the
width of frontline.
(Prevents units from being far from their expected distance from
frontline)
* Change visualgen to use the same frontline vector calculation as the
unit spawns
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