StartFileshareManagementLoop starts the management loop in separate goroutine and returns a control channel and a shutdown channel.

WaitForLogout will send over logoutChan when user under the username logs out(i.e there are no remaining user processes for that user).

NorduserProcessMonitor monitors the nordvpn system group and starts/stops norduserd for users added/removed from the group.

StartNorduserdMiddleware provides a way to start/stop norduserd when handling nordvpnd gRPCs.