Connect an industrial router to a plant over IPsec

Remote access to a plant can now run over IPsec (IKEv2), for site routers that speak nothing else. You can see whether the remote site is connected, with its availability and traffic, instead of an unknown state. A site you set up but never connected stays in the list. "Add peer" attaches a second router.

• A plant can have only one IPsec connection, and you are told so if you try to add a second.
• On the "Debug" tab you can now ping an address across an IPsec tunnel and see its route.
• An outgoing IPsec connection that is down is no longer shown as a WireGuard one.
• "Live status" no longer flashes a routing error while the remote site is not connected.