Do it for all packages that
* mention perl, or
* have a directory name starting with p5-*, or
* depend on a package starting with p5-
like last time, for 5.18, where this didn't lead to complaints.
Let me know if you have any this time.
easy to author semantically-useful documents with special consideration
given to HTML5 output. Things like blog posts, wiki articles, and
documentation are meant to be easy to write using Nimble.