Support for h5ai(HTML5 Apache Index) directory listing about httpdirfs

[mahfuzullah]

the main difference between h5ai and Apache directory listing is instead of "/.." h5 uses "parent directory" which causes some sort of parsing error.

here's a demo site for replicating this behavior https://larsjung.de/h5ai/demo/

[fangfufu]

Oh what you described is not a problem. The actual problem is that with h5ai, all the links start with /, HTTPDirFS assumes that no link starts with '/', and it uses the href attribute as the filename, rather than the text associated wit the a tag.

This is not exactly easy to fix - I need to change the way HTML_to_LinkTable (https://github.com/fangfufu/httpdirfs/blob/master/src/link.c#L391) works by getting it to grab link text rather than href link as the filename. Then I need to allow non-alphanumeric file name.