* Run as mailman user. * Run mailman core process as a less-privileged mailman user. * Add a `docker ps` to travis to know if any container died. * Spit out more debug information in CI. * Install su-exec properly.
* Run as mailman user. * Run mailman core process as a less-privileged mailman user. * Add a `docker ps` to travis to know if any container died. * Spit out more debug information in CI. * Install su-exec properly.