cmd/cli: add missing pre-run setup for start command

Otherwise, ctrld won't be able to reset DNS correctly if problems
happened during self-check process.

cmd/cli/commands.go

@@ -234,6 +234,7 @@ NOTE: running "ctrld start" without any arguments will start already installed c
 				mainLog.Load().Error().Msg(err.Error())
 				return
 			}
+			p.preRun()
 
 			status, err := s.Status()
 			isCtrldRunning := status == service.StatusRunning