refactor: clearer IPAM config
refactor: clearer IPAM config

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