doc: update slurm.conf(5)

Mention the ability to use glob(7) patterns for Epilog and Prolog
in the slurm.conf(5) man page.

doc/man/man5/slurm.conf.5

@@ -422,8 +422,10 @@ NOTE: If set, then a job's QOS can not be used to exceed partition limits.
 .TP
 \fBEpilog\fR
 Fully qualified pathname of a script to execute as user root on every
-node when a user's job completes (e.g. "/usr/local/slurm/epilog"). This may
-be used to purge files, disable user login, etc.
+node when a user's job completes (e.g. "/usr/local/slurm/epilog"). A
+glob pattern (See \fBglob\fR(7)) may also be used to run more than
+one epilog script (e.g. "/etc/slurm/epilog.d/*"). The Epilog script
+or scripts may be used to purge files, disable user login, etc.
 By default there is no epilog.
 See \fBProlog and Epilog Scripts\fR for more information.
 
@@ -1123,11 +1125,13 @@ which uses process group IDs and is the default for all other systems
 \fBProlog\fR
 Fully qualified pathname of a program for the slurmd to execute
 whenever it is asked to run a job step from a new job allocation (e.g.
-"/usr/local/slurm/prolog").  The slurmd executes the script before starting
-the first job step.  This may be used to purge files, enable user login, etc.
-By default there is no prolog. Any configured script is expected to
-complete execution quickly (in less time than \fBMessageTimeout\fR).
-See \fBProlog and Epilog Scripts\fR for more information.
+"/usr/local/slurm/prolog").  A glob pattern (See \fBglob\fR(7)) may
+also be used to specify more than one program to run (e.g.
+"/etc/slurm/prolog.d/*"). The slurmd executes the prolog before starting
+the first job step.  The prolog script or scripts may be used to purge files,
+enable user login, etc.  By default there is no prolog. Any configured script
+is expected to complete execution quickly (in less time than
+\fBMessageTimeout\fR).  See \fBProlog and Epilog Scripts\fR for more information.
 
 .TP
 \fBPrologSlurmctld\fR