ulimit stack size and python threads

[Greg Lindahl]

I see. I should be blaming the default behavior of pthreads. I did
work on a OpenMP library once, and we worked around this problem, plus
we gave good error messages. Given the number of HPC sites which use
Python, I'd think that Python would have grown similar features. (HPC
sites are more likely to have intermediate-sized stack limits due to
use of Fortran.)

-- greg