#8112 Filter out comments from rss feeds
The main RSS feed for the news/blog shouldn't include comments, only the blog posts. However, feeds for individual posts should include the comments to that post.
Currently the comment thread logic across all tool types goes through the Thread.post_to_feed function. We'll need to evaluate if other tools besides blog (like wiki and tickets) should work the same, or if they should continue to include comments (or have an option to do either). The post_to_feed method adds comment posts in the same format as news posts, so we'll need to add a way to distinguish between them.
See also old ticket [#5458] which as some related improvements to be made to comments in rss feeds.
Fix on db/8112
Looks good, clear to merge.