Rename "recycle" notification to "recycled".
When the MQTT Publish QOS was set to 1: At least once, it could result in a recycle loop due the message being received by the recycle subscription, which was then interpreted as a request to recycle instead of a notification that a recycle has taken place. After this change "recycle" is used to request a recycle and "recycled" is used to notify that a recycle has taken place.
Related to !320 (merged)