Ticket 49241 - Update man page and usage for db2bak.pl

Description:  The usage and man page should state thtthe backup directory
              is actually a symlink to the the server's backup directory.
              Otherwise it is misleading, and could eventaully lead to
              diskspace issues.

https://pagure.io/389-ds-base/issue/49241

Reviewed by: firstyear(Thanks!)

(cherry picked from commit 0804c43991fa29ef7bd946b3e5a37844e2b87da4)

ldap/admin/src/scripts/db2bak.pl.in

@@ -33,8 +33,8 @@ sub usage {
     print(STDERR "        -w -          - Prompt for Directory Manager's password\n");
     print(STDERR "        -Z serverID   - Server instance identifier\n");
     print(STDERR "        -j filename   - Read Directory Manager's password from file\n");
-    print(STDERR "        -A backupdir  - Backup directory (backupdir/ID-<date_time>)\n");
-    print(STDERR "        -a backupdir  - Backup directory\n");
+    print(STDERR "        -A backupdir  - Backup directory symlink(backupdir/ID-<date_time>)\n");
+    print(STDERR "        -a backupdir  - Backup directory symlink\n");
     print(STDERR "        -t dbtype     - Database type (default: ldbm database)\n");
     print(STDERR "        -P protocol   - STARTTLS, LDAPS, LDAPI, LDAP (default: uses most secure protocol available)\n");
     print(STDERR "        -v            - Verbose output\n");

man/man8/db2bak.pl.8

@@ -47,7 +47,7 @@ The name of the file that contains the root DN password.
 The backend database type (default: ldbm database).
 .TP
 .B \fB\-a\fR \fIbackupdir\fR
-The directory where the backup should be stored.
+The directory where the backup should be stored.  This directory is a symbolic link to the actual backup files located under "nsslapd-bakdir" directory that is set in the "cn=config" entry.
 .TP
 .B \fB\-A\fR \fIbackupdir\fR
 This is similar to \fB-a\fR, except that a sub-directory of \fIbackupdir\fR will be created for the backup, and the name of the sub-directory will be a timestamp of the form \fIserver-instance-date_time\fR.