Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Use hoststat/purgestat instead of sendmail -bh/-bH so the calls can
be properly mailwrapper'ed.

PR: conf/60676
Submitted by: Colin Percival <cperciva@daemonology.net>, maxim
MFC after: 4 days

Do not do manually what sendmail(8) can do better automatically.
Tell sendmail to clean up its own host status cache.
The error condition handling could probably be done better.

o Test and change to the correct directory, /var/spool/.hoststat
o Bring if/then style in sync with /etc/rc scripts

PR: conf/41570
Submitted by: Konstantin M Volevatch <cox@rosnet.ru>
MFC after: 1 week

Another overhaul of the periodic stuff.

All periodic sub-scripts <larf> now have their return codes interpreted
by periodic(8). Output may be masked based on variable values in
periodic.conf.

It's also now possible to email periodic output to arbitrary addresses,
or to send it to a log file, examples of which can be found in
newsyslog.conf.

The upshot of it all should be no discernable changes to the default
behaviour of periodic(8).

PR: 21250

Introduce /etc/defaults/periodic.conf, similar in concept to rc.conf.
The only change in the default functionality should be that
the output reports are slightly more verbose WRT files deleted.

Not objected to by: freebsd-arch

$Id$ -> $FreeBSD$

Remove remaining traces of the prototype...

Clean up persistent host status from sendmail(8) (if so configured).
I had accumulated years' worth of junk files; now others won't
have to.