in my application, I make heavy use of sync gateway’s document expiration in order to keep the amount of documents a client receives reasonable. I discovered that using ?show_exp=true, the sync gateway does not return expired documents on GET and bulk_get. However, in the changes feed these expired documents still appear and neither the show_exp parameter nor active_only=true has an effect. This is bad because a client that synchronizes with the server using _changes has to try to fetch all documents, with some of them being expired. It would be nice if _changes just would not show expired documents, thus potentially saving many requests. Is this somehow possible / planned?