Handbook - Jails: Rewrite the chapter

Changes:

• Add jail types info: Thick, Thin, VNET and Linux Jails
• Add info about the necessary configuration on the host system
• Add info about types of networking in the jails
• Explain the jail config file
• Add info about how to configure Thick, Thin, VNET and Linux Jails
• Explain how to upgrade the different types of jails
• Add info about the resources limits in a Jail
• Add info about different jail managers and containers

Information obtained from:

• https://man.freebsd.org/cgi/man.cgi?query=jail&sektion=8
• https://wiki.freebsd.org/Jails
• https://man.freebsd.org/cgi/man.cgi?rctl(8)
• https://vermaden.wordpress.com/2023/06/28/freebsd-jails-containers/
• https://clinta.github.io/freebsd-jails-the-hard-way/
• https://jacob.ludriks.com/2017/06/07/FreeBSD-Thin-Jails/
• Jails and VNET a guide - Derik J. Ramirez
• https://wb-hk.blogspot.com/2016/04/freebsd-jails-4-thin-jails-using-nullfs.html
• https://blog.uidrafter.com/freebsd-jails-network-setup
• https://forums.freebsd.org/threads/setting-up-a-debian-linux-jail-on-freebsd.68434/
• https://github.com/msimerson/Mail-Toaster-6/wiki/Linux-Jails
• https://etherealwake.com/2021/08/freebsd-jail-networking/
• https://wiki.freebsd.org/TomMarcoen/JailNetworking
• https://weblog.antranigv.am/posts/2020/06/vnet-jail-howto/

PR: 203641, 200905, 209157, 248150, 263330, 264317,

226282, 239861, 166358, 178221, 265410

Reviewed by: karels@, fernape@, jrm@
Differential Revision: https://reviews.freebsd.org/D41450