Including, but not limited to:
- All the hooks in https://www.mediawiki.org/wiki/Category:Extension_hooks_provided_by_Renameuser
- https://www.mediawiki.org/wiki/Writing_an_extension_for_deployment#Compatibility_with_other_deployed_extensions
- https://www.mediawiki.org/wiki/Template:Log_events should probably no longer point to https://www.mediawiki.org/wiki/Special:MyLanguage/Extension:Renameuser; does a better page exist? If not, one should potentially be created, somewhere, so that the extension page can be archived at a later date...
Follows-up: T27482: Merge RenameUser into core; blocker to T331218: Archive the RenameUser extension.