"@StopNode" is the message that is going to be printed by the dying node before it dies.  Also, it looks like we print no user-friendly message when we're going to die here.  Add one to the self-kill, and then use it for the remote kill, too?  Or suppress the message in the poison pill and print the identical message in ForeignHost, or something?  Either way, we should print a consistent log message regardless of how the node is killed, and it should be less nebulous than 'received poison pill'.