Make chutney select different options depending on the tor version
Some versions of tor have bugs that chutney needs to work around, for example, #20996 (moved) requires tor versions <= 0.3.0.1-alpha to set UseMicrodescriptors 0
when setting ClientUseIPv4 0
.
But we want to test newer versions without this workaround, so we need some kind of versioning feature. (Or test alternatives, where we report more than just pass or failure - but I think that's a different ticket.)