Category and tag archive pages should generate correct link rel for feeds

[borismann]

Currently, if you go to a category archive page (eg. /categories/cat-name) the link rel in the header simply outputs the main blog feed. There is no way to tell -- including from view source -- that there are per category / tag feeds available.

This might just be a general enhancement to bloginfo(rss2_url) -- it could auto detect what page it is on and just "do the right thing" -- otherwise you end up having to manually edit the PHP of the header of themes to put logic in for this.

Moving enhancements to 2.8.

OK, I'm actually going to call this a bug, rather than an enhancement / feature. If there is a feed available for the blog / category / tag / page you are on, the auto discovery link in the header should show it.

The "main feed" can also show (multiple link rel=feed are allowed), but the feed for the page you are on should be first.

I will take a look.

It appears this issue was addressed (at least partially) by
https://core.trac.wordpress.org/ticket/8878

So if you view source:
​http://drhailin.wordpress.com/category/uncategorized/

You can see
<link rel="alternate" type="application/rss+xml" title="Dr. Hailin blog &raquo; Uncategorized Category Feed" href="​http://drhailin.wordpress.com/category/uncategorized/feed/" />

Let me know if this is not sufficient, or if you have better ideas.

closing as dup of #8878, which fixed it.