[CFT] Unicode collation string and reworked locale definitions

[Garrett Cooper]

> On Nov 2, 2015, at 02:17, Baptiste Daroussin <bapt at FreeBSD.org> wrote:
> 
>> On Mon, Nov 02, 2015 at 10:04:11AM +0000, David Chisnall wrote:
>>> On 1 Nov 2015, at 21:30, Baptiste Daroussin <bapt at FreeBSD.org> wrote:
>>> 
>>> All issues reported has been fixed, except if more issues are reported, this
>>> will be merged into head next saturday: November 7th
>> 
>> That’s really excellent news!  Thanks for doing this.  Are there any good potential sources for the regex stuff?  I think std::regex in libc++ supports multibyte character sets, but is very full of templates and not very easy to translate into C.
> For te regex tools, it will be another step. I was planning to incorporate
> libtre + apple's patches like dragonfly did, it would need a lot of tests, but
> from my current testing performances are better than our current implementation.
> And it makes libc's regrex passing way more entries in the AT&T regex test suite
> 
> If anyone else want to work on bringing in that I would be very glad as I have
> already too much things in my plate :)

I was about to say... The regex tests on FreeBSD in tools/regression/lib/libc are quite broken ;(.. (Bug 191354). I'd like to fix/salvage those test cases if at all possible -- this might be a good motivator for that.
Thanks,
-NGie