Issue #132
Added a hook to signal the VM is shutting down (or rebooting). Used in the network server radio to close the connection properly. Before the UI had to wait for a timeout to detect a closed connection, so a reboot would show up as the same node connecting a second time, and then the original connection disconnects. This is confusing because the last line will be “client X disconnected”, suggesting it’s no longer connected, while a new connect had already been established a bit earlier.