pgcat does not honor startup parameters about pgcat

[levkk]

Fixed application_name, the other ones I'll do later, they are slightly more involved I think. I'll keep this issue open until the remaining parameters are implemented.

[levkk]

Should be an easy fix, I'll push something soon @drdrsh 👍

[djohnson]

Hey @levkk, just stumbled across this open ticket while trying to debug some encoding issues. We've seen temporary issues with client_encoding not being set that we suspect are related to this bug as they first started appearing after switching to pgcat.

[levkk]

Makes sense. You can set client_encoding on the server just like we do with application_name, e.g. https://github.com/levkk/pgcat/blob/master/src/client.rs#L1041

PR welcome!

P.S. Ideally we set all parameters with a single query, so maybe something like server.set_parameters(...) which will execute SET application_name = foo; SET client_encoding = bar;, etc.