use Perl

I have a new module, PerlIO::locale, on CPAN. It's a trivial piece of DWIM -- a subclass of PerlIO::encoding that guesses the encoding from the current locale. However, there are a couple of interesting points:

• It's statically linked with encoding.so, to correctly get pointers on the internal PerlIO functions defined by it. Better ideas welcome.
• It has no tests. (Well, it has one test: use_ok.) It's typically difficult to write portable tests for this kind of modules, without knowing which locales are available on the tester's machine, then switching locales appropriately, etc. I'll have to figure out a way to do it without being too tired.