Add COMPLETING node and job states.

 o src/slurmd : if session manager process is killed, ensure that entire
   session is also dead, and make sure all task exit msgs are sent to
   clients
 o src/slurmd/reattach.c : initialize job->hostid in reattach code

 o src/srun/ : srun code cleanup.
   Do not set stdin nonblocking as this has a side-effect of setting stdout
   and stderr nonblocking too.
 o src/slurmd : code cleanup. Terminate if read of public key fails.
 o src/common/credential/signature_utils* : code cleanup

Initialize/free/set alloc_sid and alloc_node in API functions.
Pack/unpack/free new elements in job descriptor RPCs.

 o srun/ : place temporary fix for stdout nonblocking I/O problem

 o srun : fix problem with loss of output from stdout stream.
          When stdio buffering is on, fprintf/fputs do not return errors
          when the buffers are apparently overflown (?), setting unbuffered
          IO seems to fix the problem.
 o slurmd/io.c : some slurmd io cleanup

   revoked after second use.
 o common/daemonize.c : do not report inability to open pidfile as an
   error (since it invariably is not)
 o slurmd/ : more initialization cleanup.

   PEM_read_PrivateKey() and PEM_read_PUBKEY(). Dump the x509 stuff...

 o src/srun   : various signal handling fixes, retry task launch req on failure

All references to header files changed to new pathname.

 o testsuite/.../Makefile.am : slurmctld modules depend on libhostlist.la

 o split hostlist and eio functionality into separate convenience libraries
   (so they do not need to be included in libcommon)

http://www.gnu.org/software/libtool/manual.html#SEC38

   creation functions into allocate.[ch]
 o src/common/xsignal.[ch] : xsignal returns old signal handler
 o src/slurmd : remove list of running threads - use number of active
   threads instead. (terminating slurmd sleeps until all active threads
   have vanished)

   - fix some EXTRA_DIST declarations so that CVS/ directories don't get
     inlcuded in a make dist
   - add forced target to rebuild any dependent convenience or api libs
     (if necessary)

 o Try harder to clean up shm semaphore in slurmd
 o call daemon(1,0) instead of daemon(0,0) in slurmctld to preserve chdir()

slurm_cancel_job RPC now takes signal argument.

   prolog is run as root and failure is reported as a non-zero return code
   from the launch tasks or launch batch job messages
   epilog is run as result of revoke credential message

New RPC added for slurmd to send batch_sid to slurmctld.