Found via `codespell -i 3 -w --skip="./3rdparty" -I ../opencv-whitelist.txt`

'WITH_' variables is intended to enable CMake scripts with some autodetection logic.
'WITH_' can be off, but components is really enabled via command-line options
with proper variables setup (including 'HAVE_').

Newer versions of VTK have moved some of the reader objects into vtkIOGeometry.