Revert r261296.  This removes the WITHOUT_NCURSESW option.

It was the wrong direction.  We will instead remove use of the
non-wide-character supporting libncurses.
Remove documention of WITHOUT_NCURSES removed in r266157.

Remove a bit of whitespace from WITHOUT_BINUTILS.

Catch up with a bunch of other commits to tools/build/options that
weren't merged to src.conf.5.