support export the yaml that tools-v2 used

[caoxianfei1]

provide a command that export the yaml file to use for tools-v2.

global:
  httpTimeout: 1000ms
  rpcTimeout: 1000ms
  rpcRetryTimes: 1
  maxChannelSize: 4
  showError: false

curvefs:
  mdsAddr: 10.182.2.46:7811,10.182.2.47:7811,10.182.2.48:7811
  mdsDummyAddr: 10.182.2.46:8811,10.182.2.47:8811,10.182.2.48:8811
  etcdAddr: 10.182.2.46:3490,10.182.2.47:3490,10.182.2.48:3490
  s3:
    ak: minioadmin
    sk: minioadmin
    endpoint: http://10.182.30.15:9000
    bucketname: chengyi01
curvebs:
  mdsAddr: 10.182.2.46:9200,10.182.2.46:9201,10.182.2.46:9202
  mdsDummyAddr: 10.182.26.46:9210,10.182.26.46:9211,10.182.26.46:9212
  etcdAddr: 10.182.2.46:3510,10.182.2.46:3511,10.182.2.46:3512
  root:
    user: root
    password: root_password

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[hdbdn77]

是希望使用 curve COMMAND 命令显示当前的配置吗

[youarefree123]

Hello, I am a postgraduate student at Nanjing University of Information Science and Technology，commonly used languages are C++ and Go. I have learned the course MIT6.82. Can I try this issue?

[caoxianfei1]

是希望使用 curve COMMAND 命令显示当前的配置吗

curve COMMAND can generate it.

[caoxianfei1]

Hello, I am a postgraduate student at Nanjing University of Information Science and Technology，commonly used languages are C++ and Go. I have learned the course MIT6.82. Can I try this issue?

Of course.