mod_http_oauth2: Return validation output added in trunk rev 72d7830505f0
It's not fun at all to try to register a client and only get back
"failed schema validation", this should help with that.
-- this module is deprecated, log an error and load the superseding modules instead
module:depends"smacks"
module:depends"nooffline_noerror"
module:log("error", "mod_smacks_noerror is deprecated! Just use mod_smacks and load mod_nooffline_noerror if you explicitly disabled offline storage (mod_offline)");