Please allow comments in the `feeds` file

It would be useful to have shell-style comments in the `feeds` file, so that one can easily edit the file without having a separate `hash:name` file. E.g.,

```sh
# fritter
dat://9900f9aad4d6e79e0beb1c46333852b99829e4dfcdfa9b690eeeab3c367c1b9a
# jazz
dat://665b6ec492c0a256e65efbc695907d10325df92963ecb2c45a4c39293fd5b1ca
# mmmmm
dat://520a00daf0a309bef7722b3f3338854e9da667d01e48dc7b83b118d86354d6d3
```

Start by locating the parser or entry point that reads the `feeds` file and inspect how feed URLs are currently handled. Done means shell-style comment lines such as `# fritter` are ignored while the following `dat://` entries continue to be read correctly; run the existing feed-related checks if the repository provides them.

Written by the indexing model from the issue text.