Due to an oversight, the addition of product usage analytics was accidentally missed off the October release changelogs.

We have updated the post above to include the following entry, which was included in this release for the following versions: 13.49, 14.41, 15.36, 16.30, 17.24, 18.11:

TL-40710       Added tool_usagedata (Product Usage Analytics) to Totara

Product Usage Analytics (usagedata) is an analytics tool used by Totara to 
and query usage data of Totara instances to be used to improve the
product.

Collected data will never include personally identifiable information
(PII) or sensitive data. All data is anonymous other than:

* The site identifier: Used to allow us to identify subsequent usage statistics
* The site’s URL: Used to allow us to match the site's usage data to a
subscription. This is only used should we identify an issue with your site
and need to contact you.

For the full list of data collected by Product Usage
Analytics, see the overview page (Quick Access Menu > System
Information > Collect Usage Data).