[PATCH]: libiberty Warnings patrol

[DJ Delorie]

> Changes to regex.c should be sent to the glibc maintainers; the
> libiberty version is copied from there (plus a few libiberty-specific
> patches).

Of course, as soon as I said that, the glibc folks went and imported a
completely new version of regex, and recommended I not import it
because it's not 100% reliable yet.  So at the moment, libiberty's
regex lives only in libiberty.