+20080203
+ + modify _nc_setupscreen() to set the legacy-coding value the same
+ for both narrow/wide models. It had been set only for wide model,
+ but is needed to make unctrl() work with locale in the narrow model.
+ + improve waddch() and winsch() handling of EILSEQ from mbrtowc() by
+ using unctrl() to display illegal bytes rather than trying to append
+ further bytes to make up a valid sequence (reported by Andrey A
+ Chernov).
+ + modify unctrl() to check codes in 128-255 range versus isprint().
+ If they are not printable, and locale was set, use a "M-" or "~"
+ sequence.
+
+20080126
+ + improve threading in test/worm.c (wrap refresh calls, and KEY_RESIZE
+ handling). Now it hangs in napms(), no matter whether nanosleep()
+ or poll() or select() are used on Linux.
+