WebSocket proxy should keep static data around forever

[teh-cmc]

Currently the proxy just drops older data as memory becomes scarce.

It should instead instantiate an actual store with proper garbage collection so that static data always sticks around.

[slyfox3]

While we are on this, can we add also a new option to connect() to only receive static + future data, but not older data?

[teh-cmc]

While we are on this, can we add also a new option to connect() to only receive static + future data, but not older data?

Once the proxy is backed by an actual ChunkStore, that would be fairly trivial to implement yes.