Log Message:
cmake: Use NetBSD curses(3) when possible

ccmake needs wsyncup(3) and since NetBSD 8.0 it is present on NetBSD.
Handle that via `USE_CURSES= wsyncup' and remove enforcements about
ncurses in CMakeLists.txt and Source/Checks/Curses/CMakeLists.txt.

Bump PKGREVISION