Mod: modidfy Refer params and add licence

[fangyincheng]

What this PR does:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-io]

Codecov Report

Merging #317 into feature/grpc will decrease coverage by 0.02%.
The diff coverage is 95.45%.

@@               Coverage Diff                @@
##           feature/grpc     #317      +/-   ##
================================================
- Coverage         66.84%   66.82%   -0.03%     
================================================
  Files               118      118              
  Lines              7396     7400       +4     
================================================
+ Hits               4944     4945       +1     
- Misses             1963     1966       +3     
  Partials            489      489

Impacted Files	Coverage Δ
remoting/zookeeper/listener.go	48.2% <ø> (-1.8%)	⬇️
protocol/protocolwrapper/mock_protocol_filter.go	0% <0%> (ø)	⬆️
registry/protocol/protocol.go	81.73% <100%> (ø)	⬆️
config/reference_config.go	79.61% <100%> (+0.82%)	⬆️
protocol/grpc/client.go	87.5% <100%> (+1.78%)	⬆️
protocol/dubbo/dubbo_protocol.go	91.83% <100%> (ø)	⬆️
protocol/jsonrpc/jsonrpc_protocol.go	91.83% <100%> (ø)	⬆️
protocol/grpc/grpc_protocol.go	95.23% <100%> (ø)	⬆️
registry/directory/directory.go	83.67% <100%> (-0.12%)	⬇️
...rotocol/protocolwrapper/protocol_filter_wrapper.go	51.42% <100%> (ø)	⬆️
... and 1 more

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[flycash]

please format imports

[fangyincheng]

please format imports

done.

[flycash]

I've run tests locally, it works well

[flycash]

LGTM

[zouyx]

LGTM

[hxmhlt]

LGTM