Add etcd part of config support, add noColor/json support (#8439)

- Add color/json mode support for get/help commands
- Support ENV help for all sub-systems
- Add support for etcd as part of config

cmd/server-main.go

@@ -192,6 +192,7 @@ func serverHandleEnvVars() {
 		}
 		globalActiveCred = cred
 	}
+
 }
 
 // serverMain handler called for 'minio server' command.