CAS-14283: Include stopcode for cycleniter criterion
Cycleniter is a "minor cycle exit criterion", which have their own set of
stopcodes that overlap in number with the major cycle criteria. For users of
interactive clean, this means that both cycleniter and niter (global) criteria
have stopcode 1.
In order to prevent confusion, I've assigned stopcode 11 to cycleniter. Since
this is the only minor cycle stopping criterion we are evaluating at the
moment, I have not implemented stopcode 12+ for the other conditions.