• [bj]login support for external custom command via [bj]login.conf config file
• freejname: also check remote nodes databases
• add facter instance variables for external hooks command:
  ${ipv4_first_public} ${ipv4_first_private} ${ipv4_first}
  ${ipv6_first_public} ${ipv6_first_private} ${ipv6_first}
• add vmpackages: grouped settings for vm
• add zfs-migrator: ZFS-based cloning instances between ZFS nodes,
  at the moment without integration with jcoldmigrate and work only
  via root ssh connection. Issue #118 also participates here