Add unix domain socket listener to service.ListenAndServeUnix (#837)
Add unix domain socket listener to service.ListenAndServeUnix (#837)

* Add ListenAndServeUnix

* Revert "Add ListenAndServeUnix"

This reverts commit 33f8e6ec22690d7d98ac5a7bda434724e281b3c2.

* Add Serve function for any listner can start

* Fix comment

ZjMNZHgG5jMXw/goa,smessier/goa