Merge branch 'devel-2.3'

Merge branch 'devel-2.3'

* devel-2.3:
  Updates NEWS and configure.ac for 2.3.0~rc1
  Update NEWS & configure.ac for the 2.2.2 release
  Fix documentation regarding conversion to drbd
  Fix documentation regarding conversion to drbd
  Reinstall instance: disallow offline secondaries
  QA: check that doubly modifying an OS state is OK
  Fix breakage in OS state modify
  QA: add tests for gnt-cluster modify -B
  LUSetClusterParms: fix validation of beparams
  Add unittests for TemporaryReservationManager
  TempReservationManager: Reserved() doesn't work

Conflicts:
	man/gnt-instance.sgml (ported to the RST version)

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>