There is a new pull request by pbui against master on the void-packages repository

https://github.com/pbui/void-packages vpnc-scripts
https://github.com/void-linux/void-packages/pull/14860

vpnc-scripts: update to 20190611.
Remove fix-ipv6 patch (changes upstreamed).

A patch file from https://github.com/void-linux/void-packages/pull/14860.patch is attached