[openwrt] missing "vid" option in "switch"

[cappe87]

The configuration shown in the programmable switch example doesn't work.

I needed to add the vid attribute to the netjson, eg:

{
    "switch": [
        {
            "name": "switch0",
            "reset": true,
            "vlan": [
                {
                    "device": "switch0",
                    "vlan": 4,
                    "ports": "4t 6t",
                    "vid": "170"
                }
            ],
            "enable_vlan": true
        }
    ]
}

[nemesisdesign]

After doing some research and after asking for help in the lede-dev channel on IRC, I propose the following solution:

I can automatically generate the vid option from the vlan field but allow to override this automatic behaviour by explicitly setting vid.

In the docs I will explain this behaviour in detail with a couple of examples.

What do you think @cappe87?