Configure a new Core without starting services.

Configure a new Core without starting services.

Tasks that actually start services are tagged with ~actualizer~.  Thus
~ansible-playbook~ can be given the ~--skip-tags actualizer~ command
line option to configure a new Core without actually setting the
static IP address, domain name, etc. nor starting any services.

The intention is to work through any problems configuring core
services on new hardware running, probably, a new OS version /without/
disturbing actual Core services.

This required splitting many Enable/Start tasks in two: the latter
tagged as the "actualizer".