non-exec stacks on solaris.

[avalon () COOMBS ANU EDU AU (Darren Reed)]

not long ago, someone posted that you can disable execution of
instructions on the stack via /etc/system for solaris.  There
appears to be three variables for this:

noexec_user_stack
noexec_user_stack_log
noexec_zfod_argsp

The first two are pretty obvious, but what about the third ?

Darren