This way, we can use both `docker kill -s INT some_container` and `docker kill -s SIGINT some_container` and both will do nice things for us. :) Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon) Upstream-commit: 4cb602afa0a905ceb0cccf49fe142c1c7b62087b Component: engine