coder/websocket arms a context.AfterFunc that hard-closes the connection
when a write context is canceled, and AfterFunc stop does not wait for a
callback that already started. An external cancellation (e.g. ingress
lease loss) landing inside the disarm window of an already-successful
downstream write could therefore kill the TCP connection before the
retry close frame (1013) was written, leaving the client with a bare
EOF. Mirror the read side: bound downstream writes with the write
timeout only, and rely on the explicit Close/CloseNow performed by every
relay exit path for teardown.
Fixes the flaky TestPassthroughLifecycle_LeaseLossSendsRetryClose.
shaw
21aacde0b3