ServerI interface and implementations must be refactored

There is a serious problem with the structure of the ServerI interface/implementations. Rework will include pulling this code into a new module, reconsidering many of its methods, and removing the atrocious use of singleton implementations of ServerI inside ServerI for convenient reference. At the end of this refactoring it should be possible to expose the ServerI instances through the service registry only.

Many of the functions currently served by "GenericServer" overlap with what should be provided by the ServerI abstraction itself. It is not clear to me why this additional abstraction exist at all.