Update slurm.conf man page.
Affinity tests to support larger systems

Change the integer to hex function to support 32-bit unsigned
integers and exit on systems with more than 32 cpus per node
since Expect can not work with numbers so large.
Always clear JOB_SPECIAL_EXIT on job prio set

If a job's priority is set non-zero then always clear the
JOB_SPECIAL_EXIT job state flag, not only when the prior
state is HELD_USER or HELD.
I'm not sure how the job could have cleared the HELD state
and changed to NO_REASON, but this would fix the problem.
bug 760
Merge branch 'slurm-14.03'