unit testing difficulties

[jdamick]

Without being able to change the "backend/backendStdin/backendRun" or having defined interfaces for Ipvs, Service, etc. it is difficult to mock out this library. Would you be open to either exposing the backend variables or providing a way to set them or creating interfaces for the existing structs? I am happy to create a PR to help.

I have had to resort to creating a set of adapters around the library in order to mock it, however this is time consuming and only benefits me. So i'm happy to contribute in any way.

[tylerflint]

@jdamick this is already on our todo list, just buried behind a bunch of other things. We would be very grateful if you were willing to assist here.

Thanks!