mod_pubsub_serverinfo: Detect existence of pub/sub node Instead of blindly trying to create the pub/sub node to publish items to, a service discovery query is performed to check if node creation is required. Added various bits of warn and debug logging, to give a user better feedback if and why something is failing.

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labels:
- 'Type-Auth'
summary: SASL OAuthBearer Mechanism
...

Introduction
============

This module adds a new SASL mechanism OAUTHBEARER, as defined in [RFC-7628](https://tools.ietf.org/html/rfc7628).

It's intended to be used together with the `mod_auth_oauthbearer.lua` module.