Control (not Controll) whether...
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This looks like it's actually a downstream patch by @mmodell:
https://phabricator.wikimedia.org/rPHAB41c8bb0cec697f1e1a360fcc211d9d445cb4e8cf
(The option itself can be lifted out into a proper extension in modern code, at least, although the callsite which uses the option probably can not, so perhaps this would be a net loss in clarity.)