Comment 13 for bug 684317

IMHO the code is ready to be used, I don't have anything else to add.

There are some remaining issues, which cannot be easily fixed:

1. 'A' < 'a' but 'ą' < 'Ą' - this is because former is coming from ascii code comparison, and the latter from strcoll.
Reported upstream: http://sourceware.org/bugzilla/show_bug.cgi?id=14039

  Possible solutions:
  - always use strcoll - gives a consistent ('a' < 'A' and 'ą' < 'Ą') ordering but is slower for ascii characters, especially in case insensitive mode.
  - just flip 'a-z' and 'A-Z' codes manually [1] (also gives 'a' < 'A' and 'ą' < 'Ą')
  - wait for http://sourceware.org/bugzilla/show_bug.cgi?id=14039 to be resolved (would give 'A' < 'a' and 'Ą' < 'ą' but that's very unlikely)

2. あ < a < あa < aa < あaa
Reported upstream: http://sourceware.org/bugzilla/show_bug.cgi?id=14038

  No solution (but hopefully this will be fixed upstream). If fixed, then the workaround in the patch (g_strconcat) will not be necessary, so we can then improve performance a bit by removing it.