(ITS#5891 Update slapdadd (and related tools) -n option

doc/man/man8/slapadd.8

@@ -108,6 +108,12 @@ configuration file.  The
 cannot be used in conjunction with the
 .B \-b
 option.
+To populate the config database
+.BR slapd-config (5),
+use 
+.B \-n 0
+as it is always the first database. It must physically exist
+on the filesystem prior to this, however.
 .TP
 .BI \-o " option[=value]"
 Specify an

doc/man/man8/slapcat.8

@@ -103,7 +103,12 @@ Write LDIF to specified file instead of standard output.
 .TP
 .BI \-n " dbnum"
 Generate output for the \fIdbnum\fR\-th database listed in the
-configuration file.  The
+configuration file. The config database
+.BR slapd-config (5),
+is always the first database, so use
+.B \-n 0
+
+The
 .B \-n
 cannot be used in conjunction with the
 .B \-b

doc/man/man8/slapindex.8

@@ -92,7 +92,12 @@ processed, and not its glued subordinates (if any).
 .TP
 .BI \-n " dbnum"
 Generate output for the \fIdbnum\fR\-th database listed in the
-configuration file.  The
+configuration file. The config database
+.BR slapd-config (5),
+is always the first database, so use
+.B \-n 0
+
+The
 .B \-n
 cannot be used in conjunction with the
 .B \-b