ncurses 5.9 - patch 20130309

+ amend change to toe.c for reading from /dev/zero, to ensure that
  there is a buffer for the temporary filename (cf: 20120324).
+ regenerated html manpages.
+ fix typo in terminfo.head (report by Sven Joachim, cf: 20130302).
+ updated some autoconf macros:
  + CF_ACVERSION_CHECK, from byacc 1.9 20130304
  + CF_INTEL_COMPILER, CF_XOPEN_SOURCE from luit 2.0-20130217
+ add configure option --with-cxx-shared to permit building
  libncurses++ as a shared library when using g++, e.g., the same
  limitations as libtool but better integrated with the usual build
  configuration (Redhat 911540).
+ modify MKkey_defs.sh to filter out build-path which was unnecessarily
  shown in curses.h (Debian #689131).