better backup script

setup

@@ -325,6 +325,9 @@ NETBIOS_NAME=${netbios_name}
 # BACKUP_RETENTION_WEEKLY=2
 # BACKUP_RETENTION_MONTHLY=2
 # BACKUP_RETENTION_YEARLY=1
+# BACKUP_LOG_FILE=/var/log/backup.log
+# BACKUP_PROGRESS=auto
+# BACKUP_PROGRESS_INTERVAL_SECONDS=10
 EOF
 
   chmod 600 "$ENV_FILE"