* Parse lxc key from api data for lxc containers
When configuring containers in the `/etc/pve/lxc/` file, the API
adds a 'lxc' key that caused the plugin to crash as it tried to
split a list on ','.
This commit introduces logic to convert the list of lists in the
returned data to a dict as with the other keys.
```
'lxc': [['lxc.apparmor.profile', 'unconfined'],
['lxc.cgroup.devices.allow', 'a']]
```
becomes
```
"proxmox_lxc": {
"apparmor.profile": "unconfined",
"cap.drop": "",
"cgroup.devices.allow": "a"
}
```
* Add changelog fragment
Co-authored-by: Felix Fontein <felix@fontein.de>
Co-authored-by: Philippe Pepos Petitclerc <peposp@gmail.com>
Co-authored-by: Felix Fontein <felix@fontein.de>
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