ncurses: support monochrome terminals

* If the background color would be non-black, render text in reverse
  video. ncurses doesn't do that automatically.
* Fixes rendering under historical terminals like VT100 and VT240,
  but also all of the monochrome versions of modern emulators in terminfo.
* This also improves the situation when $TERM is set to something conservative,
  e.g. when connecting via RS232.
* Scinterm is temporarily changed to my own fork, which already contains
  a monochrome patch.

1 files changed, 0 insertions, 0 deletions

diff --git a/contrib/scinterm b/contrib/scinterm
-Subproject 430822df945b51ce1ed3026047fe8967a18d1ff
+Subproject 3a47c1b053c7316a4237d55fce125683a43eca2