Previously srun would fail if the hostlist expression was larger
than 0xffff bytes.

When using ThreadsPerCore > 1, it appears that DefMemPerCPU is being
scaled by slurmctld, but not by slurmd/slurmstepd.

For example, we set ThreadsPerCore=2 and DefMemPerCPU=100. Running a
single core job, we would expect two threads to be allocated and AllocMem
on the assigned node to increase by 200MB. scontrol reports that AllocMem
increased by 200MB, but the task/cgroup plugin only sees 100M of RAM.

It looks like the problem may lie in common/slurm_cred.c:format_core_allocs().
The function counts the job/step cores and multiplies the mem_limit's,
but it does not scale the CPU count like in slurmd/slurmd/req.c:_check_job_credential().
See bug 309

This is the correction of the slurm client which otherwise fails the
PMI2_Init() step. This hidden bug was introduced in the standalone
client made from BULL and David's modification made it occur : a wrong
size (by 1 too short) was passed to strncpy for keys, then David
replaced strncpy by MPICH's MPIU_Strncpy forcing a terminal '\0'.

Bug 359

messed up output.  Use the parsable options if you want this kind of
view.