#713 Merge (spelling) edits made by GDAL team in GDAL's libcsf code back into raster format

[Kor de Jong]

See https://trac.osgeo.org/gdal/ticket/6230

The diffs in the linked tickets show the edits to verify(!) and merge. Afterwards, compare GDAL's libcsf code with our raster format code. There should be no diffs.