+ fixes to build c++ binding with clang 3.0 (patch by Alexander
Kolesen).
+ add check for unctrl.h in test/configure, to work around breakage in
some ncurses packages.
+ add "--disable-widec" option to test/configure script.
+ add "--with-curses-colr" and "--with-curses-5lib" options to the
test/configure script to address testing with very old machines.