Docs - update man page description of -D flag.

Logs go to both locations when running in non-daemonized mode.
Don't refer to this as "debug" mode, while useful for debugging
it's not directly related.

Bug 3146.

doc/man/man8/slurmctld.8

@@ -30,7 +30,7 @@ jobs will be killed.
 
 .TP
 \fB\-D\fR
-Debug mode. Execute \fBslurmctld\fR in the foreground with logging to stdout.
+Run \fBslurmctld\fR in the foreground with logging copied to stdout.
 .TP
 \fB\-f <file>\fR
 Read configuration from the specified file. See \fBNOTES\fR below.

doc/man/man8/slurmdbd.8

@@ -13,7 +13,7 @@ for Slurm. This is particularly useful for archiving accounting records.
 OPTIONS
 .TP
 \fB\-D\fR
-Debug mode. Execute \fBslurmdbd\fR in the foreground with logging to stdout.
+Run \fBslurmdbd\fR in the foreground with logging copied to stdout.
 .TP
 \fB\-h\fR
 Help; print a brief summary of command options.