mod_pubsub: Move precondition error wrangling out of util.pubsub Removes dependency on util.error from util.pubsub which was only used for this one special case. Line count reduction! Would be even nicer if templating could be done by util.error itself.

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