There is an updated pull request by 4ricci against master on the void-packages repository

https://github.com/4ricci/void-packages patch-1
https://github.com/void-linux/void-packages/pull/21332

thttpd: unbreak
Place cgi-bin executables in /usr/libexec instead of /usr/share.

A patch file from https://github.com/void-linux/void-packages/pull/21332.patch is attached