Autodetect if we talk to docker via tcp in the Makefile
Autodetect if we talk to docker via tcp in the Makefile

n054/weave,weaveworks/weave,n054/weave,n054/weave,weaveworks/weave,paulbellamy/weave,paulbellamy/weave,weaveworks/weave,weaveworks/weave,paulbellamy/weave,n054/weave,n054/weave,paulbellamy/weave