r16665: Fix a couple of bugs I discovered now I've looked

r16665: Fix a couple of bugs I discovered now I've looked
closer at the wins server code. Firstly, it needs
to do the searches on the SELF_NAMES correctly,
secondly it needs to flush the in-memory cache
out before returning the 1b names - else it might
get duplicates returned if many 1b queries are
done in quick succession. Jerry, I hate to say
this but you might want to consider this for 3.0.23....
Jeremy.
(This used to be commit b36b9befbbc4ac318168b7788d3722710ecbf10f)