Fixes #31027 - transpiler macros for CoreOS family

Fixes #34236 - Drop require_ssl_smart_proxies setting

This defaults to true and setting it to false can create security
problems. Mandating client SSL certificates creates a more secure
environment.

Previously when require_ssl_smart_proxies was false, reverse DNS was...

Fixes #32064 - drop Puppet related settings

Keeps Puppet CA settings as Puppet CA is still in.

Extracted in: theforeman/foreman_puppet#122

Fixes #33607 - use setting DSL for Puppet category

Fixes #33601 - use setting DSL for Provisioning category

Fixes #33596 - use setting DSL for Notification category

Fixes #33595 - use setting DSL for Email category

Fixes #33589 - use setting DSL for Authentication category

Fixes #32893 - use setting DSL for General category

This uses our new DSL to define the General settings, this showcases how
to use the new DSL and other categories should follow in the same
release.

Fixes #31049 - Introduce server CA file setting