curs_refresh(3) on FreeBSD

The text 0aafdba14b0a, as FreeBSD 2.1.7.1-RELEASE, FreeBSD 2.1.7-RELEASE, FreeBSD 2.1.5-RELEASE, FreeBSD 2.0.5-RELEASE shipped it.

refresh ncurses windows and lines

curs_refresh(3) on FreeBSD now