Currently, STUN can be enabled server-wide and all clients will try to connect P2P when connecting. However, it's difficult to tell if an issue only affects P2P or all connections including DERP as there's no way to turn it off without disabling it for the entire deployment.

Add a flag to every coder CLI command that connects to workspaces to --disable-p2p. Make sure this is logged so users can tell it definitely worked.