Problem: libedit is a very pure-ASCII oriented library,
and it is not aware of extended (0x80..0xFF) or even multi-byte
characters. It considered such characters as non-printable
and didn't allow to input them.
Fix: make libedit think that all bytes >= 0x80 are printable.


cmd-line-utils/libedit/el.h:
  Defining macro, a locale's isprint() replacement.
  We'll consider all 8bit values as printable characters.
cmd-line-utils/libedit/key.c:
  Changing isprint() to el_isprint().
cmd-line-utils/libedit/map.c:
  Changing isprint() to el_isprint().
cmd-line-utils/libedit/read.c:
  Changing isprint() to el_isprint().
cmd-line-utils/libedit/refresh.c:
  Changing isprint() to el_isprint().