Signal channel should have a buffer of 1. (#381)

Signed-off-by: Brian Brazil <[email protected]>

main.go

@@ -227,7 +227,7 @@ func main() {
 
 	level.Info(logger).Log("msg", "Loaded config file")
 
-	hup := make(chan os.Signal)
+	hup := make(chan os.Signal, 1)
 	reloadCh := make(chan chan error)
 	signal.Notify(hup, syscall.SIGHUP)
 	go func() {