This change ensures that, in turn, we're able to "remote" all the traffic generated by the `geolocate` package, rather than missing some bits of it that were still using the standard library and caused _some_ geolocations to geolocate as the local host rather than as the remote host. Extracted from https://github.com/ooni/probe-cli/pull/969, where we tested this functionality. Closes https://github.com/ooni/probe/issues/1383 (which was long overdue). Part of https://github.com/ooni/probe/issues/2340, because it allows us to make progress with that.