<TOOLS>
The VLIST command had been present in FIG and other forth
implementations. It has to list all accessible words. In PFE
it list all words in the search order. Well, the point is,
that we do really just look into the search order and are
then calling WORDS on that Wordl. Uses ?CR
reference: p4_vlist in ../src/toolkit.c:0225, export CO VLIST