---
upgrade:
  - The 'live_migration_flag' and 'block_migration_flag' options in libvirt
    section that were deprecated in Mitaka have been completely removed in
    Newton, because nova automatically sets correct migration flags. New config
    options has been added to retain possibility to turn tunnelling,
    auto-converge and post-copy on/off, respectively named
    `live_migration_tunnelled`, `live_migration_permit_auto_converge` and
    `live_migration_permit_post_copy`.