Update to upstream release 1.5.4 (bugfix release)

Details:

• Update to upstream release 1.5.4, changelog see https://github.com/containous/traefik/releases/tag/v1.5.4
• Install sample configuration file that allows to start traefik out of the box without configuration tweaks
• Add pkg-message; includes a note on how to accomplish binding to privileged ports

MFH: 2018Q2