In rcctl ls, skip all files with a '.' in the name, not just rc.subr;

In rcctl ls, skip all files with a '.' in the name, not just rc.subr;
pkg_add renames files in this way when the checksums don't match at update
or removal time. [[ ]] suggestion from guenther@ to avoid the messy "case"
that I had in my first diff. Other feedback/suggestions from halex aja
millert, ok halex@ aja@.