Fix following/followers API to return correct link headers (#3268)
Fix following/followers API to return correct link headers (#3268)

Link headers in following/followers API should include follow_id as max_id/since_id.

However, these API use current_user's account_id instead of follow_id from #3167.
This causes irrelevant result on loading more users.
kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon