RST vs FIN handling #1483
Description
Currently, Ztunnel will swallow any upstream RST and send a standard downstream FIN. This may or may not impact application behavior. We should consider forwarding the RST.
Note that Envoy claims to do this (https://github.com/envoyproxy/envoy/pull/28817/files) but doesn't actually seem to in practice IME. I haven't had a chance to compare other proxies like socat, nginx, etc