[Bug]: RSS endpoints need to handle remote users/communities #5997
Description
Requirements
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Summary
As mentioned in LemmyNet/lemmy-ui#3449, we cant assume that remote instances have RSS feeds available, so we need to serve all RSS feeds from the local domain. That means we need to support feeds like these:
/feeds/u/[email protected]?sort=New/feeds/c/[email protected]?sort=New
In fact the first url is already generated by lemmy-ui when viewing a remote user profile and throws an error as feeds.rs doesnt split on @ and only looks for local users/communities.