Please test new user defaults / languages code in gnustep-base

[Richard Frith-Macdonald]

I've just made a fairly major rewrite of NSUserDefaults code in gnustep-base 
(at svn revision  32454), and this needs testing, particularly be people using 
different languages.

The purpose of the rewrite was to make the code more maintainable and less 
fragile, in particular to try to be sure it's thread-safe but avoids 
deadlocking issues.  I had found a small thread safety issue which had been 
introduced a while back by a patch intended to prevent deadlocks, but with the 
code in the state it was in I could not see how to fix the thread safety 
problem without re-introducing the possibility of deadlock ... hence the need 
to restructure/simplify. 

The old code was horribly complicated because of the way it tried to use 
different methods for determining the appropriate language to use if the 
NSLanguages user default was not set up... this resulted in a web of mutually 
recursive method calls, where any modification to the existing code was likely 
to result in infinite recursions.
The rewrite simplifies all that, but my worry is that in doing so I may have 
broken something for people using machines with different locales ... 

So I'd like to encourage people to try out the latest code and report any 
broken language related behavior please.