[ucc] process trees/groups issue

[David Emrich]

> > What things can't you catch and are they likely to 
> > happen in your (bug free) task1 ?
> 
> SIGNUKE - process indicates that a nuclear meltdown is 
> occurring, cannot be caught or ignored.

SIGHEIL (click).  Process indicates that IT MUST BE OBEYED ;-)

Cannot be ignored, instant death if caught.

[dav]