Additionally, if this flag ever goes away, the "kFormatUrlOmitTrivialSubdomains" is the internal flag for this, it seems[1], though its description says it's "Not in kFormatUrlOmitDefaults"[2].
Back when they removed the "http:" off of URLs, I used to use a hex editor to turn the kFormatUrlOmitHTTP bit flag off every time I got a new build, so I'd get the URL formatting I wanted, but eventually lost the mental wherewithal to continue the hack every week.
Incidentally I want to figure out how to do this on Linux.
I presume I need debug symbol files, which I can download easily.
How would I do this?