+ adjust ifdef in test_opaque.c to fix build with ncurses 5.7
+ add testing note for xterm-{hp|sco|sun} -TD
+ corrected description for ansi.sys-old -TD
+ add xterm+nopcfkeys, to fill in keys for xterm-hp, xterm-sun -TD
+ use hp+arrows in a few places -TD
+ use hp+pfk-cr in a few places -TD