Last of the four. The vhost, its `auth_request` block and the swarm
apex's dns record move into swarm-ui.nix; vhosts.nix drops `uiCfg`,
`controllerCfg` and `autheliaCfg` and is now 259 lines of hive surface
with no swarm service in it.
Also collapses a THIRD copy of the per-service list. `networking.hosts`
restated every service's name with its own copy of that service's guard,
after the vhosts and the dnsmasq records had each done the same. It asks
the same question — which names does this host answer for — so it now
reads the same answer: a service added later lands in /etc/hosts with no
edit, and cannot land there under a different condition than it used for
DNS.
The `forceSSL`-not-`addSSL` comment travels intact: it records that
authelia answers an http auth subrequest with 400 and nginx's
auth_request only understands 2xx/401/403, so the scheme is load-bearing
for this vhost and no other.
030eef0948