This will eliminate the need to add each new language to DNS, and make Incubator more easy to find. For example https://und.wikipedia.org/ will be redirected to https://incubator.wikimedia.org/wiki/Wp/und
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Really wildcard or more like "populate DNS (langlist.tmpl) with all language codes from ISO-693-3 table"?
I could go either way on the subject of explicit langlist vs wildcard, really, so long as we're confident the MediaWiki layer handles all unknown language codes (really, unknown random hostname labels...) sanely, including crazy ones like :ffq384f9q8f9qj9j-/\.wikipedia.org or whatever. It would even make some things simpler at the DNS and Caching layers if we could assume that. I'd have to go do a quick audit of our DNS data for all the canonical domains to see what kind of exceptions there are, though.
The swap of Traffic for Traffic-Icebox in this ticket's set of tags was based on a bulk action for all such tickets that haven't been updated in 6 months or more. This does not imply any human judgement about the validity or importance of the task, and is simply the first step in a larger task cleanup effort. Further manual triage and/or requests for updates will happen this month for all such tickets. For more detail, have a look at the extended explanation on the main page of Traffic-Icebox . Thank you!