mod_invites: Refactor argument handling using util.argparse This makes it so that --admin and --role are no longer mutually exclusive, they the former is simply treated as another --role. This was likely a leftover from when only a single role was possible. It does however become unclear which should be the primary, since the order is not preserved by argparse. Bonus: Loading of modules is avoided with only the --help is shown.

module:log("error", "mod_pep_plus has been renamed to mod_pep, please update your config file. Auto-loading mod_pep...");
module:depends("pep");