ease of use in slurmctld

   response message

   (to match documentation)
 o Use access(2) to determine if user has local access to file
   (instead of brute force examination of stat buffer)
 o issue warning if local command cannot be found with --batch

Also add exclude=node_list to allocate RPCs.

job time limit. Defined pack/unpack/free functions for RPC.

   on POLLHUP but no read method.
 o common/log.c : add pthread_atfork() calls to ensure sanity of log
   data structure after a fork() from a threaded program.
 o slurmd/io.c : set _obj_close as close handler for all objects
 o slurmd/shm.c : fix bug that caused lockfile to always go into /tmp
 o slurmd/mgr.c : reset log prefix to denote job id when logging to a file
 o srun/srun.c : do not call fatal() after having allocated nodes,
   use die() instead which prints an error then does goto cleanup;
 o srun/*.c : remove _debug vestigal var

   calls never block) This is only used in slurmd/mgr.c right now,
   so that log functions called in io.c do not deadlock IO thread.
 o cleanup in srun/srun.c

 o srun -d option updated to set slurmd-debuggging level
 o slurmd sends task launch resp message with list of pids
   (for totalview support)
 o Three Ctrl-C's in rapid succession to srun forcefully terminates the job.
 o Changed --kill-off to --no-kill

than single PID). Used for TotalView support.

interrupts were resetting timeout in I/O functions with timeout.

   support documented uses of --input,output,error)
 o Allow premature termination of srun (i.e. when IO is not yet
   complete) by insistent user.
 o added xstrfmtcat() and xmemcat() to xstring.c

call REQUEST_IMMEDIATE_RESOURCE_ALLOCATION. This immediate flag also
applies to the slurm_allocate_and_run_job_step() function.

Change pack32_array use 32 bit counter (rather than 16 bits).

   still remain.
 o cbuf.[ch], list.[ch] : Checked in new revisions from lsd-tools
 o srun/io.c,msg.c : added io_thr_create(), msg_thr_create() to simplify
   code in main().
 o Other minor fixes/changes

initiation.
Establish limit of MAX_TASKS_PER_NODE and add matching error code.

logging.

common needs to read anyway to route communications (avoid second read
by other tools).

support (RPC xfer and printing) of some missing control info.

 o slurmd shared memory fixes -- no longer detach/reattach around interconnect_init
 o put slurm.lock in spooldir by default
 o slurmd daemonize is now the default
 o log.c fixes -- use a shorter timestamp in logfiles

 o fix _STMT_START in macros.h
 o remove annoying "Interrupted system call" debug error for accept()
   with slurm_protocol_socket_implementation.c
 o fix some assert macros in xassert and xmalloc