Tweak a bit the description of `PROVIDE' rc.d keyword, to make it a bit
more clear that it is *required* for startup scripts. An rc.d script
without a PROVIDE keyword is not run by our rc.subr (it is skipped by
the find_local_scripts_new() shell function of rc.subr).
Inspired by: A post by Helmut Schneider, jumper99 at gmx.de,
on news:comp.unix.bsd.freebsd.misc
Message-Id: 63aggbF26iusnU1@mid.individual.net