There is an updated pull request by 0x5c against master on the void-packages repository

https://github.com/0x5c/void-packages fix/geteltorito-url
https://github.com/void-linux/void-packages/pull/50581

geteltorito: update distfile and homepage URLs.
uni-koblenz.de has removed the page and/or all userpages; now redirects to a network status page and instructions to setup campus VPN.

There is no clear new homepage and no new distfiles, so using archive.org for now. The archived version has the same checksum.

The last build of the package was so long ago that the distfile was never saved by distfiles.voidlinux.org

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A patch file from https://github.com/void-linux/void-packages/pull/50581.patch is attached