Fix missing return code for FTP backup upload

- use explicit tnftp command instead of ftp
- use single line tnftp command

BackupServerConfig.sh

@@ -10,7 +10,7 @@
 #
 ##############################################################
 
-set -ou pipefail
+set -uo pipefail
 
 ###########################################################
 # Global systemd/journald Functions
@@ -84,13 +84,7 @@ if [[ -n "$FTPHOST" ]]; then
 	rm -f "$BACKUP_FILE.gz.gpg"
 	gpg --quiet --encrypt -r "$GPGKEY" --trusted-key "$GPGKEY" "$BACKUP_FILE.gz"
 
-	ftp -p -n "$FTPHOST" >/dev/null <<EOI
-quote USER anonymous
-quote PASS anonymous@anonymous.com
-cd $FTPDIR
-put "$BACKUP_FILE.gz.gpg"
-quit
-EOI
+	tnftp -V -u "ftp://anonymous:anonymous@$FTPHOST/$FTPDIR/" "$BACKUP_FILE.gz.gpg"
 fi
 
 INFO "BackupServerConfig successful"