Merge branch 'stable-2.6'

Merge branch 'stable-2.6'

* stable-2.6:
  Version bump for 2.6.0~beta1
  Adjust cfgupgrade for new minor version
  Add support to daemon-util for distributions without start-stop-daemon
  Improve the check-news script
  Fix NEWS file
  _MaybeParseUnit: The elements are dicts not arrays
  Make it possible to reset vcpu/spindle ratio to default
  Add man page documentation for cpu_mask hv parameter
  Add checks from wrong hard-coded paths in manpages
  Fix hardcoded paths in gnt-cluster.rst man page
  First round of NEWS file updates for 2.6
  gnt-group: Adding vcpu/spindle ratio to ipolicy flags
  gnt-cluster modify: Add ipolicy for spindle ratio opt
  cli: Add ipolicy_spindle_ratio to CreateIPolicyFromOpts
  gnt-instance info: Rework beparams listings
  Fix a tiny typo
  constants: Add FIXME regarding CPU pinning bitfield

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>