Message 324847 - Python tracker

Personally, I find parent/child more descriptive if it can be used in the same context with master/slave, so I'm in favor of replacing master/slave with parent/child where applicable.

However, I agree that the code changes in PR 9100 are a bit excessive. It would be nice if we could keep the members of the public API (some of them have already been deprecated) and variable/function/parameter names left out of this cleanup.