periodic: return $rc instead of "$rc" for several scripts

Also fix a minor whitespace issue in 200.chkmounts .

periodic: Sync with FreeBSD current

* Sync periodic scripts, periodic.conf, periodic.conf.5 with FreeBSD
* The "{daily,weekly,monthly}_status_security_<var>_enable" variables are
changed to be "se

periodic: Sync with FreeBSD current

* Sync periodic scripts, periodic.conf, periodic.conf.5 with FreeBSD
* The "{daily,weekly,monthly}_status_security_<var>_enable" variables are
changed to be "security_status_<var>_enable" and
"security_status_<var>_period" (daily, weekly, monthly).
* Keep DFly-specific settings (e.g., HAMMER and HAMMER2 related)
* Ignore the FreeBSD-specific things, e.g., ZFS, GEOM

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Add missing ;

Reported-by: trevorjk

Sync etc/periodic with FreeBSD. Short summary:

- Display information about blocked counts from pf(4)
- Make df output more human readable
- Add login.conf checking to security
- Fix several bug

Sync etc/periodic with FreeBSD. Short summary:

- Display information about blocked counts from pf(4)
- Make df output more human readable
- Add login.conf checking to security
- Fix several bugs and add some enhancements to various scripts

The list of all relevant FreeBSD Revisions is available here:

http://leaf.dragonflybsd.org/mailarchive/submit/2007-12/msg00009.html

Obtained-From: FreeBSD

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