This fixes a bug introduced in commit a801d264
Whole node resource allocations with REPLACE option were not working.
Detected by test3.14 failure.

Support AuthInfo in slurmdbd.conf that is different from the value in
    slurm.conf.
There is a possible bug in the slurm_get_auth_info function (src/common/slurm_protocol_api.c) that can cause the slurmdbd daemon to look for the AuthInfo parameter in slurm.conf instead of slurmdbd.conf when the auth/munge authentication method is used (AuthType=auth/munge).

Here is the slurmdbd log revealing the problem (debug5() printing were added in the sources) :

slurmdbd: slurmdbd version 15.08.7 started
slurmdbd: debug2: running rollup at Tue Feb 02 14:20:14 2016
slurmdbd: debug5: in ../../../src/slurmdbd/slurmdbd.c, _send_slurmctld_register_req (line 690)
slurmdbd: debug5: in ../../../src/common/slurm_protocol_api.c, slurm_send_node_msg (line 3601)
slurmdbd: debug5: in ../../../../../src/plugins/auth/munge/auth_munge.c, slurm_auth_create (line 217)
slurmdbd: debug5: in ../../../src/common/slurm_protocol_api.c, slurm_get_auth_ttl (line 1732)
slurmdbd: debug5: Entering ../../../src/common/slurm_protocol_api.c, slurm_get_auth_info
slurmdbd: debug:  Reading slurm.conf file: /usr/local/slurm-15-08-7-1/etc/slurm.conf
slurmdbd: error: s_p_parse_file: unable to status file /usr/local/slurm-15-08-7-1/etc/slurm.conf: No such file or directory, retrying in 1sec up to 60sec
...

Then 60 seconds later, the auth_info value returned by slurm_get_auth_info is NULL:

slurmdbd: debug5: Leaving ../../../src/common/slurm_protocol_api.c, slurm_get_auth_info, auth_info=(null)

and slurmdbd continues without crashing, but I am not sure it is in a safe state.

When applying this patch :

diff --git a/src/common/slurm_protocol_api.c b/src/common/slurm_protocol_api.c
index c5db879..be1dab6 100644
--- a/src/common/slurm_protocol_api.c
+++ b/src/common/slurm_protocol_api.c
@@ -1703,9 +1703,13 @@ extern char *slurm_get_auth_info(void)
        char *auth_info;
        slurm_ctl_conf_t *conf;

-       conf = slurm_conf_lock();
-       auth_info = xstrdup(conf->authinfo);
-       slurm_conf_unlock();
+       if (slurmdbd_conf) {
+                auth_info = xstrdup(slurmdbd_conf->auth_info);
+        } else {
+               conf = slurm_conf_lock();
+               auth_info = xstrdup(conf->authinfo);
+               slurm_conf_unlock();
+       }

        return auth_info;
 }

the auth_info value is now valid and consistent with the slurmdbd.conf setting:

slurmdbd: slurmdbd version 15.08.7 started
slurmdbd: debug2: running rollup at Tue Feb 02 14:47:37 2016
slurmdbd: debug5: in ../../../src/slurmdbd/slurmdbd.c, _send_slurmctld_register_req (line 690)
slurmdbd: debug5: in ../../../src/common/slurm_protocol_api.c, slurm_send_node_msg (line 3600)
slurmdbd: debug5: in ../../../../../src/plugins/auth/munge/auth_munge.c, slurm_auth_create (line 217)
slurmdbd: debug5: in ../../../src/common/slurm_protocol_api.c, slurm_get_auth_ttl (line 1731)
slurmdbd: debug5: Entering ../../../src/common/slurm_protocol_api.c, slurm_get_auth_info
slurmdbd: debug5: Leaving ../../../src/common/slurm_protocol_api.c, slurm_get_auth_info, auth_info=socket=/var/run/munge/munge_dbd.socket.2

contribs/cray/csm/slurmconfgen_smw.py - avoid erroneously including
repurposed compute nodes in the list of nodes to start slurmd.

When the slurmctld is in background mode, it will issue double
  free calls on the incomming message buffers, likely leading
  an abort.

If an invalid trigger message is received by slurmctld, it could
  result in a non-zero array counter and a NULL element array.
  If the element array is NULL, then clear the counter to avoid
  xfree calls of bad pointers.

Do not automatically relocate an advanced reservation for individual cores
    that spans multiple nodes when nodes in that reservation go down (e.g.
    a 1 core reservation on node "tux1" will be moved if node "tux1" goes
    down, but a reservation containing 2 cores on node "tux1" and 3 cores on
    "tux2" will not be moved node "tux1" goes down). Advanced reservations for
    whole nodes will be moved by default for down nodes.
bug 2326

avoid attempting to execve() a directory with a name that
happens to matching that of the desired command. bug 2392.

Allow an existing reservation with running jobs to be modified without
    Flags=IGNORE_JOBS.
bug 2389

burst_buffer/cray - Increase size of intermediate variable used to store
    buffer byte size read from DW instance from 32 to 64-bits to avoid overflow
    and reporting invalid buffer sizes.
bug 2378

gres types without a File.

to debug3 when trying to find the correct association.

a continuation to commit 87d9370f

Both the original logic and modified logic failed to lock the job
data structure prior to decrementing "prolog_running" counter.

in the forward message logic.

Previously under some conditions that boot completion was ignored
and the job kept pending.

Bug 2364

Commit fa331e30 fixes this.  The logic was bad to begin with...

uint32_t new_cpus = detail_ptr->num_tasks
	/ detail_ptr->cpus_per_task;

The / should had been * this whole time.  This was the reason we found
this in the first place.

bug 2369

If scancel is operating on large number of jobs and RPC responses from
    slurmctld daemon are slow then introduce a delay in sending the cancel job
    requests from scancel in order to reduce load on slurmctld.
bug 2256

If a job launch is delayed, the test was failing due to bad parsing.
These lines were being interpretted as a counter folloed by node
names of "queued" and "has":
  srun: job 1332712 queued and waiting for resources
  srun: job 1332712 has been allocated resources

bug 2366

Backfill scheduling properly synchronized with Cray Node Health Check.
    Prior logic could result in highest priority job getting improperly
    postponed.
bug 2350

This corrects logic from commit e5a61746
that could result in use of NULL pointer

It was previously triggered by executing "scontrol reconfig" on a
  front-end system while there was a job in completing state.

Properly account for memory, CPUs and GRES when slurmctld is reconfigured
    while there is a suspended job. Previous logic would add the CPUs, but not
    memory or GPUs. This would result in underflow/overflow errors in select
    cons_res plugin.
bug 2353