17.x dev-1

[JedMeister]

v17.0 development. Until the subject of this line no longer includes the WIP prefix, this code should be considered not ready for production.

So far:

• Include new TurnKey bullseye keys
• Update default Debian PHP version and adjust the debian-security repo url
• Adjust default packages (remove gpg, add in fdisk)
• cleanup/tweak MOTD
• Include nginx modsecurity (69d381a) - closes Include Nginx libmodsecurity module. tracker#1657
• tweak dummy buildtime systemctl script
• Update default vim conf path
• Include predefined dhparams (2a6cb48) - part of Use predefined dh-params for webservers; and postfix tracker#1653
• Update turnkey-make-ssl-cert to "generate" predefined dh_params as per RFC7919 - part of Use predefined dh-params for webservers; and postfix tracker#1653

TODO (reminders for myself)

• update webserver cyphers
• migrate to php-fpm for lighty and nginx

[OnGle]

LGTM, nice work!

[JedMeister]

There's still more to go, but I will make another PR.