Ticket #7092 (new enhancement)

Description

Right now the comments feeds are throttled by the same limiting number the user chooses for "posts feeds" (posts_per_rss).

It makes sense that a blog owner would want to set a higher threshold for comments than for posts, for these reasons:

- Readers who subscribe to comment feeds are fewer in number and less likely to burden the system in aggregate.

- Comments are typically shorter per entry than posts are.

- Comments are liable to expand much more quickly than posts, making it difficult for readers to "keep up" without wrapping past the limit.

For instance in my blog I limit post feeds to 10 entries, but I'd like to offer a much larger limit for comments subscribers.

Establishing a "comments_per_feed" variable that is used in place of the "posts_per_rss" would accomplish this.