Icepack ridging interface has changed

[kshedstrom]

Icepack 1.3.4 has updated interfaces for a new CICE version. We will need to update our interfaces as well. Is this like FMS where we support old and new for a time?

[kshedstrom]

Specifically, it changed last March with this commit: commit acfc046f02c3e09f935833748e8853f393e66fc3
Remove public interface declarations where not needed
We have been using an interface which was not meant to be public.

[marshallward]

Direct calls into Icepack were bound to become a problem at some point. We discussed this and concluded that we need to introduce new config_src wrappers to the different Icepack APIs.

[kshedstrom]

Oops, I updated the call, but not the config_src thing. Will get to that tomorrow.