Add new upload limit system (fix #4234).

app/models/post.rb

@@ -1279,6 +1279,9 @@ class Post < ApplicationRecord
         # XXX This must happen *after* the `is_deleted` flag is set to true (issue #3419).
         give_favorites_to_parent(options) if options[:move_favorites]
 
+        is_automatic = (reason == "Unapproved in three days")
+        uploader.new_upload_limit.update_limit!(self, incremental: is_automatic)
+
         unless options[:without_mod_action]
           ModAction.log("deleted post ##{id}, reason: #{reason}", :post_delete)
         end