OK, based on the latest round of custom buildbot results (e.g. http://buildbot.python.org/all/builders/AMD64%20FreeBSD%20CURRENT%20Debug%20custom/builds/12/steps/test/logs/stdio ), it looks like the main remaining problems are those covered by issue 30672, where *BSD platforms handle some locales differently from the way Linux handles them (and Mac OS X then inherits those differences), and issue 30647 (where attempting to use the UTF-8 locale can cause nl_langinfo to fail).

So for the latest iteration on *this* change, I'm going to do the following:

1. Disable "UTF-8" as a candidate target locale
2. Adjust the test suite's expectations accordingly