Ah, so we should test compatibility with RAZA too...

Would you consider supporting a new GGEP flag 'CHAT' (with no payload) in the per-server (not per-file) GGEP of Query Hits, to indicate that the server supports Chat?

And/Or, specifying chat support in X-Features during Uploads/Downloads would enable chatting with transferring hosts, even if you couldn't chat through the Search Results.