Merge branch 'devel-2.4'

* devel-2.4:
  Another fix for LUClusterVerifyDisks
  QA: also run gnt-cluster verify-disks
  Fix disk adoption breakage
  Fix typo in query2 design document
  Improve documentation for QRFS_UNAVAIL
  lvmstrap: add PV-on-partition support
  lvmstrap: abstract a little the sysfs paths
  lvmstrap: ignore small-sized partitions
  lvmstrap: add explicit test for swap backends
  lvmstrap: add an explicit test for mounted devices
  lvmstrap: add more excluded FS types
  lvmstrap: fix very old contact information
  Instance query: replace duplicates with aliases
  query: Add alias support in _PrepareFieldList
  Fix disk count check in LUSetInstanceParams
  Document iallocator change (alloc_policy)

Conflicts:
        lib/constants.py (due to QRFS→RS on master and doc on 2.4)

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