mod_storage_internal: Return item-not-found for unknown before/after ids This is required per XEP-0313, otherwise clients cannot tell the difference between an empty successful query and a query where their sync point is no longer within the archive.

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