Get i/o header size from function call to be kept in sync with un/pack

that includes a buffer pointer, size, and offset. The buffer is automatically
expanded as space is needed.

add ability to iterate on data, preserve data between get info RPCs.

It used to seg-fault.
srun Makefile.am changed to re-link if comm library changes.

It used to seg-fault.

slurmd now accept batch submit RPC - It just dumps the data and returns
SLURM_SUCCESS for right now.

Convert squeue time stamp from GMT to local time and correct month
format (add 1).

_slurm_msg_sendto was not advancing the buffer pointer or decreasing the
   xmit size if the message could not be transmitted in a single send request.
_slurm_msg_recvfrom_timeout was leaving data on the socket and not reporting
   any errors if the buffer was too small for the data presented.

to the job).

improved failure recovery.

(e.g. "default"=="DEFAULT", "Yes"=="YES", etc.)

Nodes actually become usable when slurmd gets started or slurmctld
pings the node and it responds.