> Could you elaborate on the alias changes ?
> Were those coming from an updated X11 local.alias file ?

No, they are not from X11 local.alias file. They are a result of the test_locale_alias self-test, I have fixed all failures.

This test can't be backported without rest of changes, because they fix other error, for example processing encodings with hyphen. Without them test_locale_alias will fail even with updated locale_alias. I.e. we can backport either changes to locale_alias without tests, or changes to locale_alias with all changes to parser and tests, or changes to parser and all tests except test_locale_alias.

Current code doesn't work with locales with modifiers and locales with hyphenated encodings.