nsswitch.conf tells it whether to consult `/etc/hosts` (`hosts: files`), `/etc/resolv.conf` (`hosts: dns`), or systemd-resolved (`hosts: resolve`); and if multi

nsswitch.conf tells it whether to consult `/etc/hosts` (`hosts: files`), `/etc/resolv.conf` (`hosts: dns`), or systemd-resolved (`hosts: resolve`); and if multiple of those, in what order (`hosts: first second third...`).