Support Libre Avatar

Currently, Jitsi by default supports Gravatar, which is non-Free. It would be great if users could easily have their avatars displayed using Libre Avatar:

https://www.libravatar.org/

It is possible, if you are technically skilled, to do this already, but it would be much easier if the option were there to use libravatar as a source, in the same way non-Free Gravatar is present.