vmd and description of bridge/veb interface

[Atanas Vladimirov]

Hello misc,

I have the following `veb1` interface:
```
$ cat /etc/hostname.veb1
description "LAN switch"
add em1
add vport4
add vport6
up
```

and the vm.conf:
```
$ cat /etc/vm.conf
switch "uplink" {
        interface veb1
}

vm "docker" {
        enable

        memory 4G
        disk "/raid1/VMs/docker.qcow2"

        interface {
                switch "uplink"
                locked lladdr fe:e1:ba:d2:02:32
        }
}
```

and when I start the "docker" vm I have:
```
$ ifconfig veb1
veb1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>
        description: switch1-uplink
```

i.e. the `veb1` description has been changed from "LAN switch" to 
"switch1-uplink".

So, I wonder if this is intentional?

In usr.sbin/vmd/priv.c - vm_priv_brconfig() has this:

```
/* Description can be truncated */
(void)snprintf(vfr.vfr_value, sizeof(vfr.vfr_value),
    "switch%u-%s", vsw->sw_id, vsw->sw_name);

```