mod_http_oauth2: Tweak fallback error text Since the oauth error is more like the error condition, a symbolic error code, not the most human-friendly. Many error cases do have human-readable error descriptions that should be fine on their own, or changed to be. As a fallback, capitalize the error name.

module:hook("authentication-success", function (event)
	local session = event.session;
	local sasl_handler = session and session.sasl_handler;
	local log = session and session.log or module._log
	log("info", "Authenticated with %s", sasl_handler and sasl_handler.selected or "legacy auth");
end);