Review: Improve help text of network_name configuration parameter
Review: Improve help text of network_name configuration parameter

jhamrick/dockerspawner,minrk/dockerspawner,quantopian/dockerspawner,jhamrick/dockerspawner,minrk/dockerspawner,betatim/dockerspawner,jupyter/dockerspawner,betatim/dockerspawner,quantopian/dockerspawner,Fokko/dockerspawner,Fokko/dockerspawner,jupyter/dockerspawner