curs_instr(3) on FreeBSD

The text 9ec5a7602c70, as FreeBSD 2.1.7.1-RELEASE, FreeBSD 2.1.7-RELEASE, FreeBSD 2.1.5-RELEASE, FreeBSD 2.0.5-RELEASE shipped it.

get a string of characters from a ncurses window

curs_instr(3) on FreeBSD now