[RFC] iconvdata/, localedata/: Fix TSCII and document tests.

[Florian Weimer]

* Carlos O'Donell:

> We do not support what is written in the TSCII character map today,
> and the character map is completely broken and will not compile.

But will a compiled TSCII locale still work, even if the charmap file is
not parsed correctly by localdef?  As long as the locale definition does
reference any of the problematic characters?

Thanks,
Florian