When I ported my large MovableType blog to Hugo, I handled the blogroll and microblogs as sections, suppressing the generation of single pages by creating zero-length files (blogroll/single.html, etc), and pulled in all the old comments by making them a section _comment that was visible only through the "comments" taxonomy, with zero-length _comment/single.html and section/_comment.html files.

In 0.19 (Mac), no files were created in public from these templates. In 0.20 - 0.20.2, I get 4,417 zero-length HTML files. I can write a cleanup script, but unless there's a cleaner way to suppress these pages in 0.20, I'd prefer the old behavior.