ncurses 5.9 - patch 20140920

+ add ncurses*-config to bin-directory of sample package-scripts.
+ add check to ensure that getopt is available; this is a problem in
  some older cross-compiler environments.
+ expanded on the description of --disable-overwrite in INSTALL
  (prompted by reports by Joakim Tjernlund, Thomas Klausner).
  See Gentoo #522586 and NetBSD #49200 for examples.
  which relates to the clarified guidelines.
+ remove special logic from CF_INCLUDE_DIRS which adds the directory
  for the --includedir from the build (report by Joakim Tjernlund).
+ add case for Unixware to CF_XOPEN_SOURCE, from lynx changes.
+ update config.sub from
	http://git.savannah.gnu.org/cgit/config.git