Ernest Artiaga, BSC.

of "scontrol show job".  We were seeing truncation on purple.

Perhaps this entire function should be rewritten to use the xstr*cat 
functions...

Another fix to make sure steps with requested nodes have correct cpus accounted for and a fix to make sure the user can't allocate more cpus than the have requested.

fix for slurmstepd crashing on pthread_kill.  appears sending local var into a pthread doesn't always make it to the function in tack.