curs_border(3) on FreeBSD

The text 612d04c4820a, as FreeBSD 2.1.7.1-RELEASE, FreeBSD 2.1.7-RELEASE, FreeBSD 2.1.5-RELEASE, FreeBSD 2.0.5-RELEASE shipped it.

create ncurses borders, horizontal and vertical lines

curs_border(3) on FreeBSD now