Handbook-WG: Upgrade config chapter

Changes:

* Change the title of the chapter to be more acurate
* Add a config files entry (/etc, /usr/local/etc), and /etc/sysctl.conf
* Rework the entry "managing services in FreeBSD"
* Upgrade cron section and add periodic info
* Upgrade syslog section
* Remove tuning section, some parts are really outdated
* Upgrade power management section
* Little upgrades to swap section

ACPI info obtained from:

* https://freebsdfoundation.org/wp-content/uploads/2022/04/ACPI-Support-for-Embedded-Controllers.pdf
* https://freebsdfoundation.org/wp-content/uploads/2018/04/Pain-and-Suffering-on-the-Road-to-Resume.pdf
* https://wiki.freebsd.org/ACPI
* https://papers.freebsd.org/2002/watanabe-acpi.files/watanabe-acpi-paper.pdf
* https://vermaden.wordpress.com/2018/11/28/the-power-to-serve-freebsd-power-management/
* https://github.com/freebsd/drm-kmod/blob/master/drivers/gpu/drm/i915/i915_params.c

PR:                             219953,260994,216753
Differential Revision:          https://reviews.freebsd.org/D41052
Reviewed by:                    fernape, karels
Sponsored by:                   Daifressh