Add MinNodes partition configuration option support.

Load and dump  AuthType and PluginDir config structure elements to get config RPC.

 o update configure to handle conditional build of auth/{authd,munge}
 o build auth plugins as subpackages of slurm (1st try)

slurmd now issues SIGXCPU followed by sleep(kill_wait) and SIGKILL on
receipt of timeout RPC.

slurmctld sends REQUEST_KILL_TIMELIMIT when job reaches its time limit,
change job state to TIMEOUT | COMPLETING and node state to COMPLETING.
slurmd upon receipt of REQUEST_KILL_TIMELIMIT sends job SIG_XCPU and SIGKILL
then runs epilog.

slurmctld sends REQUEST_KILL_TIMELIMIT when job reaches its time limit,
change job state to TIMEOUT | COMPLETING and node state to COMPLETING.

Add COMPLETING node and job states.
Major restructuring of slurmctld node and job state transition code.
Change of comment in srun.c

Add COMPLETING node and job states.
Major restructuring of slurmctld node and job state transition code.

Add COMPLETING node and job states.

 o rename modules to not have "lib" prefix and install them into pkglibdir

of "fprintf(stderr,...)").

 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

   of running tasks in error message for task exit.

 o srun now prints exit status more like the shell, and groups output
   on a single line as much as possible.

 o remove code from no_interconnect.c that is now used by default in
   src/slurmd/smgr.c : _setup_env()