ncurses 5.9 - patch 20120728

ncurses 5.9 - patch 20120728

+ correct path for ncurses_mingw.h in include/headers, in case build
  is done outside source-tree (patch by Roumen Petrov).
+ modify some older xterm entries to align with xterm source -TD
+ separate "xterm-old" alias from "xterm-r6" -TD
+ add E3 extended capability to xterm-basic and putty -TD
+ parenthesize parameters of other macros in curses.h -TD
+ parenthesize parameter of COLOR_PAIR and PAIR_NUMBER in curses.h
  in case it happens to be a comma-expression, etc.  (patch by Nick
  Black).