Allow users to add a feed by linking to a page on a site, rather than to the feed itself

[iandioch]

Whenever a site offers a feed of a given page or section, it often links it in the head of the HTML.

For example, HackerNews has the following:

<link rel="alternate" type="application/rss+xml" title="RSS" href="rss">

matt.might.net has the exact same structure on his blog page:

<link rel="alternate" type="application/rss+xml" title="RSS" href="rss">

This is quite widespread and seems to be fairly standardised, although I haven't found the standard itself yet. It is how I find a site's feed in many cases anyway.

It would be great if we allowed a user to paste the URL of the site they want to follow, and automatically look for a feed, rather than forcing them to; it could make the site much more user friendly. It could also connect with #274 in cases where it cannot find a feed.

EDIT: Note that the tool would need to handle relative URLs, as seen in the examples above. Also, I'm pretty sure I've seen Atom feeds linked like this, and not just RSS.