As suggested by Florian Weimer:
It may make sense to move this documentation to a separate
manual page, specific to readdir_r. This will keep the
readdir() documentation nice and crisp. Most programmers
will never have to consult all these details.
Reported-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>