Legacy Authentication support for servers 1.6.4 and below.

[oneechanhax]

Im wondering how difficult it would be to allow this to run with older clients and servers while using the new APIs that are available with the servers we have.

Currently under 1.6.4 online mode, it has a "Bad login" failure, using a self-compiled version from this git repo.

There doesnt appear to be any logs in the server side about the authlib-injector doing any receiving of signals.

/root $ cat authlib-injecto
r.log
Logging started at 2024-06-11T23:06:51.982593843Z
[authlib-injector] [INFO] Version: snapshot
[authlib-injector] [INFO] Authentication server: *redacted, displaying correctly*

Having legacy servers with a working auth would be very nice, for those nostalgia fans that still want to play with the old world-gen and features.