Traefik should follow modern IT trends, and use manager/leader/worker/agent, etc. instead of "master/slave".
e.g jenkinsci/jenkins#2007 (https://issues.jenkins-ci.org/browse/JENKINS-27268)
NB: of course, it can only apply where possible, since backends like Mesos should retain their own concepts, and not add more confusion.
recent additions to golint mean that a number of files cause the
build to start failing if they are edited (we only run against changed
files)
This fixes all the errors in the repo so things don't unexpectedly start
failing for people making PRs
