Update scontrol man page.

doc/man/man1/scontrol.1

@@ -343,7 +343,7 @@ contents of the slurm.conf configuration file.
 .TP
 \fBshow\fP \fIENTITY\fP \fIID\fP
 Display the state of the specified entity with the specified identification.
-\fIENTITY\fP may be \fIaliases\fP, \fIconfig\fP, \fIdaemons\fP, \fIfrontend\fP,
+\fIENTITY\fP may be \fIaliases\fP, \fIcache\fP, \fIconfig\fP, \fIdaemons\fP, \fIfrontend\fP,
 \fIjob\fP, \fInode\fP, \fIpartition\fP, \fIreservation\fP, \fIslurmd\fP,
 \fIstep\fP, \fItopology\fP, \fIhostlist\fP, \fIhostlistsorted\fP or
 \fIhostnames\fP
@@ -360,6 +360,8 @@ named nodes will be shown.
 \fINodeHostname\fP (useful to get the list of virtual nodes associated with a
 real node in a configuration where multiple slurmd daemons execute on a single
 compute node).
+\fIcache\fP displays the current contents of the slurmctld's internal cache
+for users and associations.
 \fIconfig\fP displays parameter names from the configuration files in mixed
 case (e.g. SlurmdPort=7003) while derived parameters names are in upper case
 only (e.g. SLURM_VERSION).