Fix forward 80 to 443 to not bind on all interfaces. (#8360)

app/server.go

@@ -171,13 +171,17 @@ func (a *App) StartServer() error {
 	}
 
 	if *a.Config().ServiceSettings.Forward80To443 {
+		if host, _, err := net.SplitHostPort(addr); err != nil {
+			l4g.Error("Unable to setup forwarding: " + err.Error())
+		} else {
+			httpListenAddress := net.JoinHostPort(host, "http")
+
 			if *a.Config().ServiceSettings.UseLetsEncrypt {
-			go http.ListenAndServe(":http", m.HTTPHandler(nil))
+				go http.ListenAndServe(httpListenAddress, m.HTTPHandler(nil))
 			} else {
 				go func() {
-				redirectListener, err := net.Listen("tcp", ":80")
+					redirectListener, err := net.Listen("tcp", httpListenAddress)
 					if err != nil {
-					listener.Close()
 						l4g.Error("Unable to setup forwarding: " + err.Error())
 						return
 					}
@@ -187,6 +191,7 @@ func (a *App) StartServer() error {
 				}()
 			}
 		}
+	}
 
 	a.Srv.didFinishListen = make(chan struct{})
 	go func() {