Sonnenblume vlan ports

[Koltonowski]

This adds optional per-network DSA port mappings.

Currently, DSA VLAN generation applies every VLAN to all dsa_ports. For devices such as here for example the AVM FRITZ!Box 7530, this means that a network with untagged: true is rendered as untagged on all LAN ports.

This change keeps the existing default behavior unchanged:
if no ports: field is set, the template still uses all dsa_ports.

If ports: is set on a network, the template uses that explicit list instead. This allows location configs to express DSA layouts such as:

• VLAN 40: lan1:t lan2:u lan3:u lan4:u
• VLAN 50: lan1:u

The second line also accepts already annotated entries like lan1:t / lan2:u, while preserving the old automatic :t / :u behavior for plain port names.

[FFHener]

Thank you for trying to implement this feature. Unfortunately this approach doesnt work if you have different devices, e.g. a different Router and AP, as they would have different ports.

And it should fail or provide a way for swconfig devices