Old documentation changes? disabling gzip compression in 3.9.x

[laffer1]

Issue description

I recently discovered that the old documentation is broken on the micronaut site for 3.9.x versions. Further, the current documentation discusses disabling http compression with netty but that doesn't work with 3.9.x.

I figured out that one can create a custom HttpCompressionStrategy to workaround the lack of compression-level or compression-threshold checks i the old releases as so

  @Primary
  @Singleton
  public class CustomHttpCompressionStrategy implements HttpCompressionStrategy {
    public boolean shouldCompress(io.netty.handler.codec.http.HttpResponse response) {
        return false;
    }

    public int getCompressionLevel() {
      return 0;
    }
  }

It would be nice if the documentation was restored for the old versions and this hint was added.