Hey guys,
I don't use your project, but came across your commit here: ae2800d
Based on the comments in this commit, I'm lead to believe that the intent is to only listen on the loopback address(es) when only the port is specified.
If that is the intent, then that code is broken. If not, then ignore me. :)
Here's the relevant net.Listen() example from the golang docs: https://golang.org/pkg/net/#example_Listener
Happy trails!