This release is big! We abstracted out all I/O and renet dependency. We will continue to provide first-party integration with renet via bevy_replion_renet.
But now users can write their own integration with other messaging libraries. Refer to the documentation for instructions on how to do it, the process is very simple. See bevy_replicon_renet as an example.
This also opens up the possibility of simultaneously using multiple messaging libraries on the server, as long as the client identifiers they provide are unique.