Closed issue by pudiva on void-packages repository

https://github.com/void-linux/void-packages/issues/12507

Description:
I was trying to use *vpnc-0.5.3_6* and got this:

```
Error: either "to" is duplicate, or "uid" is a garbage.
```

Then I found some people saying that it came from *iproute2* and indeed downgrading from **5.0.0** to **4.9.0** resolved the issue. I remember **4.10.0** breaking as well, but I may have messed the build so must try again to be sure.

It seems to be coming from the **/etc/vpnc/vpnc-script** file. I'll try to submit a patch.