Merge branch 'devel-2.6'

* devel-2.6:
  Final update of NEWS file for 2.6.2 and version bump
  Fix job completion with big job queues
  confd: reduce noise during normal config reload
  Change hbal handling of !auto_balance instances
  Small corrections in man pages
  Fix gnt-instance(8) w.r.t. growable disk templates
  Stop verifying opcode results in dry_run mode
  Update NEWS for 2.6.2
  Fix TypeError when unsetting OS parameters
  cmdlib.py: don't use GetHypervisor

Conflicts:
        NEWS (trivial, integrated the 2.6.2 news)
        autotools/build-bash-completion (trivial: pathutils)

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Bernardo Dal Seno <bdalseno@google.com>