/* call-seq: * Admin.get_group(name) * Admin.get_group(gid) * * Returns a Group object for the given +name+ or +gid+. Raises an Admin::Error * if a group cannot be found for that name or GID. * *-- * Developer's Note: * * I generally oppose method overloading like this, but for this method, and * for only two types, I can live with it for the added convenience it * provides. */ static VALUE admin_get_group(VALUE klass, VALUE v_value){