working on solving unfortunate sub-link traversals

working on solving unfortunate sub-link traversals

the rcheckin command will go into sub-folders in the directory that are links, which we would prefer it not do.
there are cases where the linked sub-folder is a software product we do not have rights to update, so we should not be
trying to dive into there and mess with the source.
if a linked sub-folder does need to be checked in, then that is a special case that will have to be dealt with
somewhere else, currently.