ok don't nerf kudzu but change it a bit

[Sam Eagle]

I felt super bad in a round the other day where i got Kudzu and a powersink. I put both down in delivery. After it had grown a bit I also walled off the power sink with the RCD. People were very unhappy. I managed to cover more or less the entire middle part of the station (Podbay to bridge) with Kudzu.

For the record, it does not grow on unsimulated tiles including airbridges and shuttle tiles..