Bug#993488: maybe reason for wontfix?

[Tomas Pospisek <tpo@sourcepole.ch>]

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993488#16 contains a 
"wontfix + close" but no rationale. Which leaves the original reporter 
with a large "?" I guess.

I am guessing that the reason for the "wontfix" is "that's just how Unix 
works unfortunately" aka "that's a Unix design bug"? Is my guess correct?

One other question - any idea on a way forward here? I would guess that 
behaviour (changing group membership won't change group membership of 
running processes) is rooted somewhere quite low in the stack, maybe in 
the kernel itself (or in posix :-#)? So if the original reporter would 
want to go ahead and look to that problem beeing fixed would he need to go 
talk to the kernel mailing list or do you have idea where he could go 
to?
*t