CBSD 13.1.23 release

CBSD 13.1.23 bugfix release Debian/Ubuntu cloud images: added UEFI VARS; NatCFG: split RDR/NAT rules per file; NatCFG: added 'cbsd_nat_skip_natip_network' + 'cbsd_nat_networks' settings via cbsd-pf.conf to customization of default NAT rules, #634; zfs encryption for jail: add zfs_always_unload_key params to regulate zfs-unload behavior; cbsd initenv: fix ipfw_enable=1; jget/facts: support for nic_address;...