Add handling for subscription-manager pools

Previously, the redhat_register snippet only ran
--auto-attach with subscription-manager.  Now, it
will run with --auto-attach, but also attach a
specific pool as specified by subscription_manager_pool.

Signed-off-by: Mike Burns <mburns@redhat.com>
Replace realm respond_to with checking for enc parameter
Update conditions for realm join in finish template
Fix #5754 Fix cloud-init phone_home function
fixes #5895: iptables and other security-related are no longer being disabled in kickstart
Fixes %end section on RHEL5 and older
Update FreeIPA template
Support debian and preseed