Prevent fusion pumping stations from spawning in the Rusted Archway

[Former user]

The bottom of the Rusted Archway is guaranteed to have a Gate, and something that can generate power for it. When this is a Fusion Power Station, you can simply turn it on, lay some wire to connect it to the gate, and everything is in working order. If there's a Fusion Pumping Station, there's no way to manipulate the glass hydraulic pipe in order to power the Gate.

[Jason Grinblat]

let’s add a way to specific this gate as grid-powered

[chaos]

Implemented in next update.