TELEMAC SELAFIN driver: Allow for reading and writing of IPOBO array

[nstrahl]

If I create a SELAFIN mesh then the IPOBO array is always populated with zeros. There is no way to write to this array, nor retrieve its values. Software such as BlueKenue needs this array to display the boundary in their program. I also suspect that the mesh partitioning with Partel (Metis) fails because the values in the IPOBO array are not correct. (This last point is only a suspicion of mine, I have not yet 100% confirmed this is the case).

[vcloarec]

Indeed, MDAL do not handle the IPOBO table.
That needs to rebuild the boundary from only faces and vertices information, and it is not currently implemented in MDAL.

[nicogodet]

@nstrahl I confirm that IPOBO array populated with 0 is the root cause of Partel failure.
I use a third party librarie to fix SELAFIN created by QGIS (see linked issue).