o Block SIGALRM by default
 o Only allow one thread to enter fwd_signal() at a time.

   blocked signals in threads.

   to "bar = xstrdup(foo);"

   to "bar = xstrdup(foo);":

  - use pthread_sigmask() instead of sigprocmask()
  - save blocked signals just before unblocking them in
    src/srun/allocate.c:allocate_nodes, then reinstate this mask before
    removing handlers.

Define new node configuration parameter for DOWN/DRAIN nodes: Reason=whatever.
Define node reason field for update and get info RPCs.
Slurmctld maintains the node reason, clears when node returned to service,
preserves value across restarts.

Define new node configuration parameter for DOWN/DRAIN nodes: Reason=whatever.
Define node reason field for update and get info RPCs.

Define new node configuration parameter for DOWN/DRAIN nodes: Reason=whatever.

multiple word node Reason values.

specifically to slurm controller.

   killed when a slurm_send times out. (resulting in confusing and misleading
   munge error message)

handling of get info calls with the "no change" response.

Message to controller will retry after SlurmctldTimeout period if
message to primary controller fails and backup controller returns
error indicating it is in backup mode.

nodes which are also in completing or down state.

Create the job hash table at slurmctld initialization.

WaitTime sets srun's default value for --wait. MaxJobCount sets
the maximum job count for slurmctld (replacing #define MAX_JOB_CNT).
MinJobAge sets the minimum job purrge age for slurmctld (replacing
#define MIN_JOB_AGE).

Major restructuring of the sinfo code.