Forgot to specify one sort_release condition

We want to prefer the core over CPAN, as explained in the comments, as
long as the module is in all the cores we're building.  However, we
forgot to specify the comparison function for the sort_releases call.
New cpan2efs arguments: --norecommends and --nosuggests

We are discovering a seamingly endless number of recursive
dependencies introduces by automatically expanding the recommends and
suggests dependencies, which makes the initial bootstrap process
impossible.  We still want to include these by default, if it can be
made feasible, so as a bootstrapping aid, these two new CLI options
will allow us to build problematic distributions by avoiding these on
a case nby case basis.  We'll see how this works out...