Re: libpq compression (part 3)

Thanks for working on this!

One thing I'm wondering: should it be possible for the client to change the
compression it wants mid-connection? I can think of some scenarios where
that would be useful to connection poolers: if a pooler does plain
forwarding of the compressed messages, then it would need to be able to
disable/enable compression if it wants to multiplex client connections with
different compression settings over the same server connection.