Add netplan to overlay for rislunsj

rislunsj.sunet.se/overlay/etc/netplan/01-netcfg.yaml

@@ -0,0 +1,25 @@
+network:
+  version: 2
+  ethernets:
+    ens3:
+      addresses:
+        - 109.105.111.8/25
+      nameservers:
+        addresses:
+          - 89.32.32.32
+        search:
+          - sunet.se
+      dhcp4: false
+      routes:
+        - to: default
+          via: 109.105.111.1
+          on-link: true
+    ens7:
+      addresses:
+        - 192.36.171.217/26
+      nameservers:
+        addresses:
+          - 89.32.32.32
+        search:
+          - sunet.se
+      dhcp4: false