>Your rephrasing doesn't actually make it any easier for me to
>understand what you intended...

MAXSSIZ should disappear.

your hard limit should be adjustable upwards to maybe 2 gigabytes,
though it would not have a big effect until after you called exec.
here's a sample i made up:

	% sh
	$ pmap | grep stack
	BDC00000  30720K                     [ stack ]
	BFA00000   1984K read/write          [ stack ]
	BFBF0000     64K read/write          [ stack ]
	$ ulimit -s 2097152
	$ pmap | grep stack
	BDC00000  30720K read/write          [ stack ]
	BFA00000   1984K read/write          [ stack ]
	BFBF0000     64K read/write          [ stack ]
	$ exec sh
	$ pmap | grep stack
	7FBF0000 2097152K read/write          [ stack ]
	BFBF0000     64K read/write          [ stack ]

stack space is anonymous memory, just like what you get from mmap, so
guards on how much you can use it one way are somewhat simplistic.

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