Attached is a simple patch to expose NGROUPS_MAX via sysctl.  Nothing fancy,
just a read-only variable.  glibc can use this to sysconf() the value
properly, so apps will stop relying on NGROUPS_MAX as a real constant.

Is this the right path?  Or should there be a sysconf-specific mechanism?
-- 
Tim Hockin
Sun Microsystems, Linux Software Engineering
thockin@sun.com
All opinions are my own, not Sun's