+ 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).