ncurses 6.0 - patch 20170722

+ improve test-packages for ncurses-examples and AdaCurses for lintian
+ modify logic for endwin-state to be able to detect the case where
  the screen was never initialized, using that to trigger a flush of
  ncurses' buffer for mvcur, e.g., in test/dots_mvcur.c for the
  term-driver configuration.
+ add dependency upon ncurses_cfg.h to a few other internal header
  files to allow each to be compiled separately.
+ add dependency upon ncurses_cfg.h to tic's header-files; any program
  using tic-library will have to supply this file.  Legacy tack
  versions supply this file; ongoing tack development has dropped the
  dependency upon tic-library and new releases will not be affected.