add rsf for v6
Merge branch 'feature/update_io_to_v6' of github.com:wangtuanjie/api into feature/add_rsf_for_v6
add  rpc.logger support
fix unit test
Merge branch 'feature/update_io_to_v6' into feature/add_rsf_for_v6
fix bucker could be nil bug
EOF support
fix
Merge pull request #68 from wangtuanjie/feature/add_rsf_for_v6

Feature/add rsf for v6