final decision about *at syscalls

[Roman Divacky]

> Considering Robert's paper on security race problems in things like systrace
> stemming from when you copy parameters out of userland and into the kernel
> multiple times, I think #2 is definitely the better choice.  Also, namei() is
> already thread aware AFAICT since 'struct componentname' already contains a
> 'cnp_thread' member (was 'cnp_proc' in 4.x).

two strong voices for #2, I am going that way...

thnx