ncurses 6.0 - patch 20160820

ncurses 6.0 - patch 20160820

+ update tput manual page to reflect changes to manipulate terminal
  modes by sharing functions with tset.
+ add the terminal-mode parts of "reset" (aka tset) to the "tput reset"
  command, making the two almost the same except for window-size.
+ adapt logic used in dialog "--keep-tite" option for test/filter.c as
  "-a" option.  When set, test/filter attempts to suppress the
  alternate screen.
+ correct a typo in interix entry -TD