ndb/include/ndbapi/Ndb.hpp:
  Update documentation wrt scans
ndb/include/ndbapi/NdbIndexScanOperation.hpp:
  Update documentation wrt scans
ndb/include/ndbapi/NdbOperation.hpp:
  Update documentation wrt scans
ndb/include/ndbapi/NdbRecAttr.hpp:
  Update documentation wrt scans
ndb/include/ndbapi/NdbScanOperation.hpp:
  Update documentation wrt scans
ndb/include/ndbapi/NdbTransaction.hpp:
  Update documentation wrt scans
ndb/src/ndbapi/NdbOperationSearch.cpp:
  Update documentation wrt scans