Now specify HandleSignal as an option to toggle signal handling. (#948)

Signed-off-by: Erik Hollensbe <github@hollensbe.org>

service.go

@@ -169,7 +169,9 @@ func (s *service) Run() error {
 	}
 
 	ch := make(chan os.Signal, 1)
-	signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT)
+	if s.opts.Signal {
+		signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT)
+	}
 
 	select {
 	// wait on kill signal