Comment 4 for bug 1312785

There has to be a differentiation between different systems.

On the one hand Ubuntu 16.04 is a main entry point within the structure:
    Ubuntu 16.04 » Ubuntu Server Guide » Networking »

On the other hand the link itself does not contain Ubuntu 16.04, but "lts" only:
    https://help.ubuntu.com/lts/serverguide/network-configuration.html#name-resolution

This yields to a conflict. There seems to be a need of different decoupled docs for different Ubuntu releases.