instead of 8.

The spank_fini() function is registered with atexit() to be called
after termination of the srun main() function. The registered
functions are inherited by the forked shepard process and thus
spank_fini() is called twice.
This commit fixes this problem by introducing a wrapper function
_call_spank_fini() that is a no-op in the context of the shepard
process.

Take more job options into consideration to estimate its node count.

the Slurm database.

Avoid integer overflow on platforms with 32bit suseconds_t.

At work in Sweden we often fika (coffee+buns and what have u) at 3PM. I sometimes accidentally give a start time of 'teatime', so when I return from 'fika' I see my job's just getting started. This fix should make life even easier for the Swedes.

Logs for jobs which are explicitly requeued will say so rather than saying
that a node in their allocation failed.

This is a minor change to commit 4b8cdd4c
from yesterday and is needed to work with launch/poe (which was
broken by the commit).

--export=NONE is not supported, but --export=name=value is supported.