[ISSUE] Hunt for dead packages & more

[meator <meator@users.noreply.github.com>]

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New issue by meator on void-packages repository

https://github.com/void-linux/void-packages/issues/38555

Description:
Hi. I've compiled a list of all distfiles and homepages of all packages in the void-packages GitHub repository. I then tried to test each and every URL Voidlinux has to offer to see whether they are still accessible without problems. Here is a JSON file that represents several days of sending HEAD requests[^1].

[data.json](https://github.com/void-linux/void-packages/files/9290529/data.json.txt)

I've only processed the template files, so packages that were [removed from the repos](https://github.com/void-linux/void-packages/issues/23575) but are still on the mirrors aren't listed in the file. I hope this will help me and others to uncover dead links and other problems with the packages.

The JSON file is a collections of URLs and responses. There are three types of responses:

1. normal response (for example `HTTP/2 200` or `HTTP/1.1 404 Not Found`)
2. `Error`: This means that `curl -Is` had a nonzero exit status (the page probably doesn't exist anymore).
3. `Timed out`: It took more than a minute to get the info.

I will in the near future make a PR that will remove or fix the packages with `Error` or 404 status.

I've also noticed that some `http://` links returned `HTTP/1.1 301 Moved Permanently`. [Repology also doesn't like `http`](https://repology.org/repository/void_x86_64/problems). It might be useful to `https`ify all `http` links which support it to improve security and to make Repology happy. But a bulk `distfiles` and `homepage` change would mean that a lot o packages would have to be rebuilt just to change the metadata of the package. One solution would be to do it but without revbumping the files, but usefulness of this is questionable. What do you think?

[^1]: I've been using `curl -Is | head -1` to do the work so FTP files have `Last-Modified` instead of HTTP response or nothing at all (but that doesn't mean it's bad). The gopher URLs also don't have anything there (there are only two of those URLs: `geomyidae` and `sacc` homepages).