Look for any references, without object type

        This always searches in "refspecific" mode

def resolve_any_xref(self, env, fromdocname, builder, target,
                         node, contnode):
        """Look for any references, without object type

        This always searches in "refspecific" mode
        """
        prefix = node.get('dn:prefix')
        results = []

        match = self.find_obj(env, prefix, target, None, 1)
        if match is not None:
            (name, obj) = match
            results.append(('dn:' + self.role_for_objtype(obj[1]),
                            make_refnode(builder, fromdocname, obj[0], name, contnode,
                                         name)))
        return results