Feature: Controller Program should support uninterruptable and define default behavior.

Feature: Controller Program should support uninterruptable and define default behavior.

After designing the Controller to support operating directly as "init", it later occurred to me that the default behavior of uninterruptable makes sense for "init" but not for "controller".
Change the behavior to default to interruptable for the "controller" program.

This change further implies that the program needs an opposite to the "--interuptable" parameter.
Implement the "--uninterruptable" parameter for this purpose.

I also noticed that there is already an "interrupted" variable but that code is dead.
Oops.
Resurrect this variable and use it for identifying for this updated interruptable behavior.