André Bargull 94053978bc Update language tag canonicalisation per UTS35
Main changes:
- "cmn" is now canonicalised to "zh"
- "und-x-" is prepended before grandfathered tags without modern replacements
- "und-" is prepended before privateuse-only language tags
2019-07-21 05:44:21 -07:00
..
2019-07-19 16:01:10 -04:00