the /tags.txt is an old reminiscence that contains both outdated information, incomplete information and is not really very useful.

So this is about to propose its deletion or, alternatively, make it more useful by linking to some Moodle Docs page where its use can be explained and maintained better.

Information like: https://tracker.moodle.org/browse/MDL-48855?focusedCommentId=336075&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-336075 should be there.

That is it, not critical but...