Revert outdated info related to WITH_LIBCPLUSPLUS that was included in
r261072.  src.conf.5 now matches makeman's output.
Merge from CheriBSD:
commit c1acf022c533c5ae27e0cd556977eafe3f5959eb
Author: Brooks Davis <brooks@one-eyed-alien.net>
Date:   Fri Jan 17 21:46:44 2014 +0000

    Add an option WITHOUT_NCURSESW to suppress building and linking to
    libncursesw.  While wide character support it useful we'd like to
    only need one ncurses library on embedded systems.

MFC after:	4 weeks
Sponsored by:	DARPA, AFRL