configure.lisp patch



Hi Greg,

> So, here's a patch for the latter. Sorry for the barrage.

Thanks for sending the revised patch. Help me understand what's
at stake here. What is the functionality that is enabled by this patch?
I've forgotten what this is about. In a similar vein, after applying
the patch, how can I tell if it is working as expected?
I read the patch but I wasn't able to puzzle out what it's about.

Thanks for your help,

Robert Dodier