I'm not a coder but was missing a plugin for flexget, so with help from Plugin Development Guide and copy 'n past code blocks from other plugins I have created a simple but working plugin for editing the config.yml file in the OMV web interface and restarting the daemon when saving.
Now, how do I go about sharing my work with others interested and hopefully get help with improvements? I have read about a developers forum but I don't think i have access, maybe this thread fits better there?