RSS: Fix URLs to point to the correct feed and page

[the-blank-x]

All these URLs:

• https://nitter.catsarch.com/brooke2valley/rss
• https://nitter.catsarch.com/brooke2valley/with_replies/rss
• https://nitter.catsarch.com/brooke2valley/media/rss
• https://nitter.catsarch.com/brooke2valley/search/rss?f=tweets&f-images=on&e-nativeretweets=on

have the same atom:link and link tags (<atom:link href="https://nitter.catsarch.com/brooke2valley/rss" rel="self" type="application/rss+xml" /> and <link>https://nitter.catsarch.com/brooke2valley</link>).

Additionally, the search RSS feed (for example, https://nitter.catsarch.com/search/rss?f=tweets&q=test) doesn't have query parameters for its atom:link and link tags.

I'd expect them to point to the same RSS feed and the corresponding web page respectively, instead of the user's normal list of tweets. For example, /brooke2valley/media/rss would have <atom:link href="https://nitter.catsarch.com/brooke2valley/media/rss" rel="self" type="application/rss+xml" /> and <link>https://nitter.catsarch.com/brooke2valley/media</link>.

[ButteredCats]

Just a heads up #1137 is now being used on my instance so anyone looking at those URLs to see the bug should replace nitter.catsarch.com with another instance.