Merge branch 'stable-2.8' into master

Merge branch 'stable-2.8' into master

* stable-2.8:
  Document users-setup tool
  Adjusting permissions after confd start
  Ensure the queue socket has the right permissions
  Update IAllocator interface documentation
  Add NEWS entry for hail honoring networks
  Add tests for network-aware allocation
  Honor network connections in hail
  Parse NIC data from allocation request in hail
  Support group networks in Text backend
  Parse node group networks
  Update IAllocator interface documentation
  Export connected networks to IAllocator
  Re-activate previously active disks in watcher
  Make the disks_active flag queryable
  Consider disks_active in UpgradeConfig
  Add disks_active to configuration
  Fix release of instances in QA

Conflicts:
	tools/cfgupgrade

tools/cfgupgrade was modified in stable-2.8 to remove a new parameter when
downgrading to 2.7, but this shouldn't go into the 2.9 version of
cfgupgrade.

Signed-off-by: Bernardo Dal Seno <bdalseno@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>