Re: Any objections to implementing LogicalDecodeMessageCB for pgoutput?

I have made few minor changes in the attached. (a) Initialize the

streaming message callback API, (b) update docs to reflect that XID

can be sent for streaming of in-progress transactions, I see that the

same information needs to be updated for a few other protocol message

but we can do that as a separate patch (c) slightly tweaked the commit

messages