There is an updated pull request by Gottox against master on the void-packages repository

https://github.com/Gottox/void-packages batman-adv-2021.0
https://github.com/void-linux/void-packages/pull/30347

batman-adv: update to 2021.0.


A patch file from https://github.com/void-linux/void-packages/pull/30347.patch is attached