v3: Hide onionbalance descriptors in the crowd
Minimize the differences between both v3 and other descriptors. Currently Onionbalance v3 descriptors can look different from other descriptors, which makes it possible for clients and HSDirs to learn that a service is using Onionbalance. This can be an issue for more advanced onion service threat models. .
(Moved from https://github.com/asn-d6/onionbalance/issues/12)