FTP ACP Connector

This module extends the ACP connector backend configuration by adding a new connection type called FTP. When you set up an ACP backend, you can now choose FTP as the connection type.

• The backend configuration screen gains an extra choice in the connection type field.
• When the connection type is FTP, confirming the backend triggers an FTP upload of the local directory (if any) to the server.
• When sending files, the module writes the file contents to a temporary folder, then uploads all files and subfolders to the FTP server using the host, port (default 21), user, and password configured on the backend.
• The upload preserves the folder structure and creates missing directories on the server.
• After a successful upload, the temporary folder is removed and a success message is returned.
• If the connection type is not FTP or no files are provided, the standard ACP sending logic is used instead.

This module touches the backend.acp model and adds FTP-specific behaviour to the action_confirm and send methods. It does not add new menus or reports; it only adds a new option to the existing backend configuration.