> No, because everyone who's sane implements it the same way because it's
> widely expected behavior.  I know of literally thousands of systems
> that have run for years with carefully sorted groups precisely because
> of this issue.
> 
> History sucks, doesn't it?  But we're stuck with it.  NFSv4 is not only
> not ubiquitous, it's not even in NetBSD at all.

unfortunately, our current setgroups sorts groups.
IMO, it should be reverted.

YAMAMOTO Takashi