Ignore SIGHUP signals

cmd/tile38-server/main.go

@@ -291,22 +291,24 @@ Developer Options:
 
 	signal.Notify(c, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
 	go func() {
-		s := <-c
+		for s := range c {
-		log.Warnf("signal: %v", s)
+			if s == syscall.SIGHUP {
-		if pidfile != "" {
+				continue
-			cleanup()
+			}
-		}
+			log.Warnf("signal: %v", s)
-		switch {
+			if pidfile != "" {
-		default:
+				cleanup()
-			os.Exit(-1)
+			}
-		case s == syscall.SIGHUP:
+			switch {
-			os.Exit(1)
+			default:
-		case s == syscall.SIGINT:
+				os.Exit(-1)
-			os.Exit(2)
+			case s == syscall.SIGINT:
-		case s == syscall.SIGQUIT:
+				os.Exit(2)
-			os.Exit(3)
+			case s == syscall.SIGQUIT:
-		case s == syscall.SIGTERM:
+				os.Exit(3)
-			os.Exit(0xf)
+			case s == syscall.SIGTERM:
+				os.Exit(0xf)
+			}
 		}
 	}()