ncurses 6.0 - patch 20161210

ncurses 6.0 - patch 20161210

+ add configure script option --disable-wattr-macros for use in cases
  where one wants to use the same headers for ncurses5/ncurses6
  development, by suppressing the wattr* macros which differ due to
  the introduction of extended colors (prompted by comments in
  Debian #230990, Redhat #1270534).
+ add test/tput-initc to demonstrate tput used to initialize palette
  from a data file.
+ modify test/xterm*.dat to use the newer color4/color12 values.