- allocate/free tags.
Not tested.

OK - test blockMesh with cyclics
unitTestCases/singleCyclic/

OK - test cyclics sequential running.
unitTestCases/singleCyclic/

OK - test decomposePar
tested channel395

OK - FaceCellWave
    unitTestCases/twoCavityCyclicForWallDistance/

OK - non-parallel finite volume : channelFoam
    unitTestCases/channel395-splitCyclic vs. channel395-dev

OK - parallel finite volume with processorCyclic: channelFoam
    unitTestCases/channel395-splitCyclic vs. channel395-dev

OK - preProcessing/foamUpgradeCyclics

OK - gamg - sequential.
Tested on channel395-splitCyclic with GAMG.
OK - gamg parallel.
Tested on channel395-splitCyclic with GAMG.

- initTransfer in GAMGprocessorInterfaces using nonblocking+tags
untested.

OK - cyclic baffles.
Tested on t-junction-with-fan

OK. - jumpCyclics/fanFvPatchField. All usages of jump() now need to account
for being owner() or not.
Tested on t-junction-with-fan.

OK - regionSplit
tested on singleCyclic

OK - pointFields on cyclics. volPointInterpolation.
tested on channel395-splitCyclic

OK - fvMeshSubset
tested on singleCyclic

OK - pointEdgeWave (maybe test through inversePointDistanceDiffusivity?)
tested on twoCavityCyclicForWallDistance

OK - scotchDecomp
tested with testCalcCSR on twoCavityCyclicForWallDistance

NOT WORKING - fvMeshDistribute to split cyclic patches into ones
  with different separation.
tested on singleCyclic

OK - test createPatch pointSync
note: only works if face-centre position of 0th faces is ok since uses
this for separation. Should in fact make cyclic planar using patch centre and
normal?
test on twoCavityCyclicForWallDistance with point (0 1 0) set to (0 1.001 0)

NO PROBLEM - renumberMesh
It doesn't do renumbering through cyclics.

OK - rotational cyclics.
Tested on movingCone-with-cyclics


- activeBaffleVelocity
- work out overlapping communication for PstreamBuffers.
  Different tag?
- kivaToFoam/readKivaGrid.H sorts cyclics (but in incorrect order?)
- grep for size()/2
- isoSurface.C
- referredCellList.C
- work out scheduled communication?