Fix crash in console logger and also handle bucket DNS updates (#8654)

Also fix listenBucketNotification bugs seen by minio-js
listen bucket notification API.

cmd/gateway-main.go

@@ -38,7 +38,10 @@ import (
 func init() {
 	logger.Init(GOPATH, GOROOT)
 	logger.RegisterError(config.FmtError)
-	logger.AddTarget(globalConsoleSys.Console())
+
+	// Initialize globalConsoleSys system
+	globalConsoleSys = NewConsoleLogger(context.Background())
+	logger.AddTarget(globalConsoleSys)
 }
 
 var (
@@ -145,9 +148,6 @@ func StartGateway(ctx *cli.Context, gw Gateway) {
 	// Set when gateway is enabled
 	globalIsGateway = true
 
-	// Initialize globalConsoleSys system
-	globalConsoleSys = NewConsoleLogger(context.Background(), globalEndpoints)
-
 	enableConfigOps := gatewayName == "nas"
 
 	// TODO: We need to move this code with globalConfigSys.Init()