Check that any extra directories being backed up are not the same as existing ones

src/freedombone-backup-local

     fi
     cp -f $CONFIG_FILE /root/tempbackupconfig
     cp -f $COMPLETION_FILE /root/tempbackupconfig
+    if [ -f $BACKUP_EXTRA_DIRECTORIES ]; then
+        cp -f $BACKUP_EXTRA_DIRECTORIES /root/tempbackupconfig
+    fi
     backup_directory_to_usb /root/tempbackupconfig config
 }
 
     fi
 }
 
+function valid_backup_destination {
+    destination_dir="$1"
+    is_valid="yes"
+
+    if [[ "$destination_dir" == "hubzilla" || \
+          "$destination_dir" == "hubzilladata" || \
+          "$destination_dir" == "gogs" || \
+          "$destination_dir" == "gogsrepos" || \
+          "$destination_dir" == "gogsssh" || \
+          "$destination_dir" == "gnusocial" || \
+          "$destination_dir" == "gnusocialdata" || \
+          "$destination_dir" == "mariadb" || \
+          "$destination_dir" == "config" || \
+          "$destination_dir" == "letsencrypt" || \
+          "$destination_dir" == "wiki" || \
+          "$destination_dir" == "wiki2" || \
+          "$destination_dir" == "xmpp" || \
+          "$destination_dir" == "ipfs" || \
+          "$destination_dir" == "dlna" || \
+          "$destination_dir" == "tox" || \
+          "$destination_dir" == "ssl" || \
+          "$destination_dir" == "blog" || \
+          "$destination_dir" == "owncloud" || \
+          "$destination_dir" == "owncloud2" || \
+          "$destination_dir" == "ownclouddata" || \
+          "$destination_dir" == "mailinglist" ]]; then
+        is_valid="no"
+    fi
+
+    echo $is_valid
+}
+
 function backup_extra_directories {
     if [ ! -f $BACKUP_EXTRA_DIRECTORIES ]; then
         return
         backup_dir=$(echo "$backup_line" | awk -F ',' '{print $1}' | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
         if [ -d "$backup_dir" ]; then
             destination_dir=$(echo "$backup_line" | awk -F ',' '{print $2}' | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
-            backup_directory_to_usb "$backup_dir" "$destination_dir"
+            if [[ $(valid_backup_destination "$destination_dir") == "yes" ]]; then
+                backup_directory_to_usb "$backup_dir" "$destination_dir"
+            else
+                echo $"WARNING: The backup directory $destination_dir is already used."
+                echo $"Choose a different destination name for backing up $backup_dir"
+            fi
         else
             echo $"WARNING: Directory $backup_dir does not exist"
         fi

src/freedombone-backup-remote

     fi
     cp -f $CONFIG_FILE /root/tempbackupconfig
     cp -f $COMPLETION_FILE /root/tempbackupconfig
+	if [ -f $BACKUP_EXTRA_DIRECTORIES ]; then
+		cp -f $BACKUP_EXTRA_DIRECTORIES /root/tempbackupconfig
+	fi
     backup_directory_to_friend /root/tempbackupconfig config
 }
 
     fi
 }
 
+function valid_backup_destination {
+    destination_dir="$1"
+    is_valid="yes"
+
+    if [[ "$destination_dir" == "hubzilla" || \
+          "$destination_dir" == "hubzilladata" || \
+          "$destination_dir" == "gogs" || \
+          "$destination_dir" == "gogsrepos" || \
+          "$destination_dir" == "gogsssh" || \
+          "$destination_dir" == "gnusocial" || \
+          "$destination_dir" == "gnusocialdata" || \
+          "$destination_dir" == "mariadb" || \
+          "$destination_dir" == "config" || \
+          "$destination_dir" == "letsencrypt" || \
+          "$destination_dir" == "wiki" || \
+          "$destination_dir" == "wiki2" || \
+          "$destination_dir" == "xmpp" || \
+          "$destination_dir" == "ipfs" || \
+          "$destination_dir" == "dlna" || \
+          "$destination_dir" == "tox" || \
+          "$destination_dir" == "ssl" || \
+          "$destination_dir" == "blog" || \
+          "$destination_dir" == "owncloud" || \
+          "$destination_dir" == "owncloud2" || \
+          "$destination_dir" == "ownclouddata" || \
+          "$destination_dir" == "mailinglist" ]]; then
+        is_valid="no"
+    fi
+
+    echo $is_valid
+}
+
 function backup_extra_directories {
     if [ ! -f $BACKUP_EXTRA_DIRECTORIES ]; then
         return
         backup_dir=$(echo "$backup_line" | awk -F ',' '{print $1}' | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
         if [ -d "$backup_dir" ]; then
             destination_dir=$(echo "$backup_line" | awk -F ',' '{print $2}' | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
-            backup_directory_to_friend "$backup_dir" "$destination_dir"
+            if [[ $(valid_backup_destination "$destination_dir") == "yes" ]]; then
+				backup_directory_to_friend "$backup_dir" "$destination_dir"
+            else
+                echo $"WARNING: The backup directory $destination_dir is already used."
+                echo $"Choose a different destination name for backing up $backup_dir"
+            fi
         else
             echo $"WARNING: Directory $backup_dir does not exist"
         fi

src/freedombone-restore-local

     if [ -d $USB_MOUNT/backup/config ]; then
         echo $"Restoring configuration files"
         restore_directory_from_usb /root/tempconfig config
+
         cp -f /root/tempconfig/root/${PROJECT_NAME}.cfg $CONFIG_FILE
         if [ ! "$?" = "0" ]; then
             unmount_drive
             # install according to the config file
             freedombone -c $CONFIG_FILE
         fi
+
         cp -f /root/tempconfig/root/${PROJECT_NAME}-completed.txt $COMPLETION_FILE
         if [ ! "$?" = "0" ]; then
             unmount_drive
             rm -rf /root/tempconfig
             exit 6382
         fi
+
+        if [ -f /root/tempconfig${BACKUP_EXTRA_DIRECTORIES} ]; then
+            cp -f /root/tempconfig${BACKUP_EXTRA_DIRECTORIES} ${BACKUP_EXTRA_DIRECTORIES}
+            if [ ! "$?" = "0" ]; then
+                unmount_drive
+                rm -rf /root/tempconfig
+                exit 62121
+            fi
+        fi
+
         rm -rf /root/tempconfig
     fi
 }

src/freedombone-restore-remote

     if [ -d $SERVER_DIRECTORY/backup/config ]; then
         echo $"Restoring configuration files"
         restore_directory_from_friend /root/tempconfig config
+
         cp -f /root/tempconfig/root/${PROJECT_NAME}.cfg $CONFIG_FILE
         if [ ! "$?" = "0" ]; then
             unmount_drive
             # install according to the config file
             freedombone -c $CONFIG_FILE
         fi
+
         cp -f /root/tempconfig/root/${PROJECT_NAME}-completed.txt $COMPLETION_FILE
         if [ ! "$?" = "0" ]; then
             unmount_drive
             rm -rf /root/tempconfig
             exit 7252
         fi
+
+        if [ -f /root/tempconfig${BACKUP_EXTRA_DIRECTORIES} ]; then
+            cp -f /root/tempconfig${BACKUP_EXTRA_DIRECTORIES} ${BACKUP_EXTRA_DIRECTORIES}
+            if [ ! "$?" = "0" ]; then
+                unmount_drive
+                rm -rf /root/tempconfig
+                exit 62121
+            fi
+        fi
+
         rm -rf /root/tempconfig
     fi
 }