TODO: perl-shell-window?
TODO: - upgrade to libev-4.00.
-TODO: rewrite colorRV/highlightColor logic
TODO: make fontCount dependent on ENABLE_256... in an INTELLIGENT way
TODO: --enable-256c documentation
+ - make OSC 17 / 19 apply to highlightColor / highlightTextColor.
+ - remove deprecated OSC 18 / 19.
+ - add highlightTextColor resource to change the foreground colour of
+ highlighted characters.
+ - make highlightColor apply also to selected cells with reverse video
+ but not to non selected cells with reverse video.
+ - remove colorRV resource (it was enabled only with frills off).
- fix numlock handling, the most longstanding bug to date (Emanuele Giaquinta).
- searchable-scrollback no longer ignores the first line
(Emanuele Giaquinta).