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

https://github.com/josegpt/void-packages caddy
https://github.com/void-linux/void-packages/pull/45543

caddy: update to 2.7.3.
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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/45543.patch is attached