The concept sounds good to me.

I haven't inspected the implementation completely but I do have one
comment..

(putting my backward-compat-uber-alles hat on...)

The new fields in `struct session' and, more importantly, `struct
eproc' in sysctl.h should probably be added at the end of the
struct.. there's even a `long e_spare[3]' at the end of eproc which
could be used for that..

					- Bill