It looks like this mystery has not been solved within those 11 years though! If your guess is correct, I guess they hadn't implemented Pull Requests yet whenever that code was added... 😜 I went looking for this answer, though, because in Splunk Cloud the _audit index is set to this default value for retention, and you are unable to change the retention setting for internal indexes in Splunk Cloud, so if you have a requirement to retain audit logs for 6 years, you're technically short by 6 days!
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