reorganize docs

Each host gets a directory.  Containers will soon also have their own
directory.

hosts/krov/serverko/ipv6tunnel12/lib/systemd/system/ifuptunnel.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Auto start ipv6 tunnel
+After=network.target
+
+[Service]
+ExecStart=/usr/bin/bash /root/scripts/netstart.sh
+# Remove restarts if the command is just a one-off
+Restart=on-failure
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target
+