Swarm mode -- sender based on hostname

[gaba-xyz]

It looks like the log sender will be the node hostname at least in the case where the container is running as a Swarm service which is a bit problematic when you want to separate the systems per container. I would expect the logging driver to use the container hostname which would mean that each service would be counted as a separate sender but that does not seem to be the case.

Steps to reproduce are fairly simple start 2 separate swarm services with the same papertrail url and token.