Locales and UTF-8

Note that at no point did I say that it was horribly hard to deal with
streams of UTF-8 chars. It's trivial to decode, and it's just as trivial
to interpose a wrapper so that your strings *appear* to contain single
bytes with arbitrarily large values :) but it does require a bit of extra
work. (I'm just thinking here of how long it took to get zsh's
Unicode-awareness right. Its ZLE wheel-reimplementation of readline was
the trickiest part, which is not surprising.)