If a server needs to RPC to another server and uses the messenger API it has no way to differentiate the remote not replying in time vs having used a revoked path.

Example: non-core PS requests segments from core PS via msger.GetSegs(ctx,...), if the path used to reach the core PS contains a link that is down, the messenger call will just time out.

Expected behavior: The messenger stack detects the revocation and returns the messenger call immediately with an error.