Under some linux versions, and depending of the configured
locale categories, it's possible to get a current locally
which length > 255 when calling to setlocale(LC_ALL, 0).
Later, if that long locale is tried to be restored, there
is a "setlocale(): Specified locale name is too long" warning
error.
When that happens we need to split the long locale into
individual chunks and set all the (six) locale categories
supported one by one.
Covered with tests, note that, in practice, this only
happens with linux because it supports 12 locale categories
@ OS level. Both BSD (6) and Windows (5) hardly can reach the limit.
No matter of that, the tests have been designed to ensure that
they pass on all OSs, just the new code only will be executed
on linux.
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