Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

'NetBSD.org' and some mdoc fixes.

curses_scanw, not curses_scan.

Merge two SEE ALSO sections.

Added separate man pages for curses functions to provide better
documentation of the curses functions.