ref: 49998bafa9fc705d98084c06113ee2dbcb5d8ce2
parent: a3a0a3268c2c7173b01c61131a6b43f0454dda72
author: Michael Forney <mforney@mforney.org>
date: Thu Sep 8 20:01:06 EDT 2022
9pcon: add support for Rerror in assert mode This is useful for checking error behavior of 9p servers.