Query parameters for category RSS

[Krischan]

Continuing the discussion from Rss for unanswered topics:

@blake

my change makes sure that the /latest.rss route will take into account any query parameters. If there are any other .rss routes you are hitting we may need to update those as well.

Here is a route I’d fine very useful to have:

https://meta.discourse.org/c/bug.rss?tags=markdown
https://meta.discourse.org/c/bug/1/l/latest.rss?tags=markdown