Document previously-undocumented methods. Document in terms of what
each thing achieves, not how it does it. The U+00B7 is not the period,
it is the centred dot. Fix various anachronisms; the existing docs
were out of date with the actual code.
Pick-to: 6.6 6.5
Task-number: QTBUG-111228
Change-Id: I17da880e0afd7260aa6f3b7bdddb430c437f4562
Reviewed-by: Jaishree Vyas <jaishree.vyas@qt.io>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
fd7fbaf887