The function arguments were reviewed to add missing 'const' keywords,
and some classes were modified more deeply to make some pointer class
variables constant.
New autocalibration technique to generate points in line (use case:
underground tunnels). The handling of the
positioning.generate-reference-points has changed to be able to use
several autocalibration methods simultaneously.
Like in the other modules, we get rid of the old use of "access point".
This has user-visible changes, especially in the configuration (the name
of a few options has been changed).