Fixed #7342: Ignore any Meta options starting with '_', thus making it OK for...

        # Next, apply any overridden values from 'class Meta'.

        if self.meta:

            meta_attrs = self.meta.__dict__.copy()

            del meta_attrs['__module__']

            del meta_attrs['__doc__']

            for name in self.meta.__dict__:

                # Ignore any private attributes that Django doesn't care about.

                # NOTE: We can't modify a dictionary's contents while looping

                # over it, so we loop over the *original* dictionary instead.

                if name.startswith('_'):

                    del meta_attrs[name]

            for attr_name in DEFAULT_NAMES:

                if attr_name in meta_attrs:

                    setattr(self, attr_name, meta_attrs.pop(attr_name))