Unable to cURL or wget rss feed on instances which support it
On a nitter instance, nitter.poast.org, I'm able to add /rss to the end of a URL and it downloads as feed just fine.

When adding the feed to an rss feed reader, it gave me a 403 Error instead.

Testing, I ran `curl -I -H  "Accept: application/rss+xml" -H "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0" -L https://nitter.poast.org/[Username]/rss` with a few different combinations of Accept and User-Agents and everything returned a 403 error, and the html of the "Verifying your browser" page instead. wget also returned a 403.

I tried all other instances which were marked able to give an RSS feed, and while I was able to download it through my browser, it didn't work in my feed reader or with anything command line.

Am I missing some option with cURL with a header or a cookie or something, or is this a bug? Thank you